Short answer: this guide compares parks you can reserve, local party venues and an at-home option across Florida Keys / Monroe, with posted prices and sources. For an at-home Nerf battle, Birthday Battle Box ships a complete party box for 8 players $199 or 12 players $259, free UPS shipping both ways. It arrives the Thursday before your party.
The Florida Keys run along one highway, and almost every birthday plan starts with a mile marker. A party in Key Largo and a party in Key West are a long drive apart, a county shelter in the Upper Keys is not the same as a city pavilion in Marathon, and in summer an afternoon storm can change the day. This guide is organized the way the islands are: first by where you live or are staying, then by the calendar, then by Upper, Middle and Lower Keys venues, then by what each agency says about parks, and finally by cost, with the arithmetic for 12 kids. Posted prices come from each venue's own page, and each one links to its source.
What does a kids' birthday party cost in the Florida Keys? Mini golf with food at Boondocks is $24.99 per child, the Aquarium Encounters party is $35 per guest, a county park shelter is $40 a day, and a dolphin-themed party is $650 plus tax for ten guests. Tax and tips are often extra.
Last updated October 26, 2026.
Covers Key West, Stock Island, Big Pine Key, Marathon, Islamorada, Key Largo and Tavernier (Monroe County). Next review: before winter break (December 21, 2026).
Quick Picks
Find the row that sounds like your party, then use the rest of the guide for the details.
| Your situation | Where we'd start | Posted price | Why |
|---|---|---|---|
| Upper Keys, a crowd, a small budget | A Monroe County shelter at a park such as Key Largo Community Park | $40 a day plus a $25 use fee for 1 to 25 people | Shade and tables for the day; the county decides in writing, so apply early |
| Upper Keys, rain in the forecast | Pinfish Entertainment in Tavernier | Party price not published | Duckpin bowling, an arcade and axe throwing under one roof |
| Upper Keys, a dolphin fan | Theater of the Sea in Islamorada | $650 plus tax for 10 guests | Admission, shows, a volunteer role for the birthday child and a themed cake are in the package |
| Middle Keys, an animal lover | Florida Keys Aquarium Encounters in Marathon | $35 per guest | A diver greeting, animal feedings, two hours in a party area and cupcakes |
| Lower Keys, a classic kid party | Boondocks on Ramrod Key | $24.99 per child | Mini golf, a meal and a two-hour party zone in one price |
| Key West, a rainy afternoon | Elev8 Indoor Golf | $45 to $80 per bay | Air-conditioned private bays with clubs included |
| Key West, a water-lover with a small crew | Key West Tiki Boat | Quote on request | A private boat for up to 11 friends |
| A garden setting with a playground | Key West Tropical Forest & Botanical Garden, Stock Island | Pricing by request | The Meadows is a grassy area, and the Nature Chapel is the garden's only indoor space |
| A vacation rental with a pool deck or yard | A party at the house, with food and a shade plan | No venue fee; food and supplies only | You skip the permit and the drive up or down US-1 |
| Active kids who would rather play at the house | A shipped Nerf party kit (our own product, described plainly below) | $199 for 8 players, $259 for 12 | No host and no travel; you run the games |
Island calendar: storms, school breaks, festival weeks and turtle nests
Settle the date before you call anyone. In the Keys the weather and the calendar do more to a party than the venue does.
Hurricane season runs June 1 through November 30 (National Hurricane Center). Pick a backup date, and treat a named storm in the forecast as a reason to call vendors early, not late. Summer afternoons are also hot and stormy even without a named storm, and many parks close at sunset, so morning parties are the safest bet outdoors. Plan shade, water and sunscreen for any outdoor date.
Monroe County School District 2026-27. Students report August 12, 2026. Winter Break is December 21 through January 1, with classes resuming January 5. Spring Break is March 22 to 26, 2027, and the last day is May 28, 2027, an early-dismissal day. Some professional days are marked as hurricane make-up days, so check the district calendar before you fix a date (Monroe County School District 2026-27 calendar).
Thanksgiving week. The district calendar shows the Thanksgiving holiday on Thursday, November 26, 2026, with a non-work day on the 27th (district calendar). The Key West Butterfly & Nature Conservatory closes at 2 PM that day (conservatory).
Turtle nesting. Sombrero Beach's sea-turtle nesting season runs April through October, and some areas are limited (City of Marathon). Keep party games away from marked areas, and do not disturb anything in a nesting zone.
Festival weeks. Key West's big festivals (Fantasy Fest in October, Hemingway Days in July and Lobsterfest in August) bring crowds and higher lodging prices. The 2027 dates are not confirmed, so check Fantasy Fest and Visit Florida Keys before you book a date that falls near one.
Wind. Delivered inflatables shut down above 15 mph winds, per We Rent Fun. Breezy days are one more reason many Keys families skip inflatables.
Booking windows we found. Aquarium Encounters parties must be booked at least 10 days ahead with a 25 percent non-refundable deposit (Aquarium Encounters). Monroe County wants a Request for Use and a notarized hold-harmless at least 5 business days before the date (county policy). The City of Marathon asks pavilion requests to arrive a week or more before your date (City of Marathon). We found no published booking window for most other venues, so call.
The Upper Keys: Key Largo, Tavernier and Islamorada
Parks and shelters
Key Largo Community Park is open 7 AM to 9:30 PM, and pavilion reservations go through the county's Key Largo office (Key Largo Community Park page). The county policy also lists Friendship Park in Key Largo, Harry Harris Park and Old Settlers Park in Tavernier, and Rowell's Waterfront Park on Overseas Highway among the properties it covers (county policy). Fees and the approval process are in the agency section below.
Founders Park (87000 Overseas Hwy) is the Village of Islamorada's flagship park. It is open sunrise to sunset, free for village residents, and non-residents pay at the gate: $10 for adults and $7 for youth and seniors, with higher summer weekend and holiday rates. The park page says the tiki huts and large pavilion are available to rent to village residents for small special events, so a visiting family or a vacation-rental guest should ask whether a rental is possible. A village fee-schedule exhibit adopted in December 2025 shows different non-resident figures than the park page, so confirm the day's price when you call the park office at 305-853-1685 (Islamorada fee-schedule resolution). The park rules ban alcohol with zero tolerance, glass, smoking and personal grills, and they ask for no loud amplified music (Founders Park rules).
John Pennekamp Coral Reef State Park (Key Largo) is open 8 AM to sunset. Pavilions are $53.75 for the large one (up to 60 people) and $32.25 for the small one, excluding entry. Entry is $8 per multi-occupant vehicle plus $0.50 per person up to 8 people, $4.50 for a single occupant and $2.50 for a pedestrian or bicyclist. Read the state-park rule in the agency section before you plan any blaster game there.
Indoor and attraction parties
Pinfish Entertainment (Tavernier) has six duckpin lanes, an arcade and axe throwing, and hosts birthday parties. The party page lists no price, so call (Pinfish). Hours are Monday to Thursday 4 to 9 PM, Friday 4 to 10 PM, Saturday noon to 10 PM and Sunday noon to 8 PM (Pinfish). It calls itself the only full-service family entertainment center in the Upper Keys. A bowling hour plus two $25 game cards and food is offered as a combo; the page does not show that combo's price (Pinfish combo).
Theater of the Sea (mile marker 84.5, Islamorada) offers a birthday package at $650 plus tax for 10 guests that includes admission, shows, a volunteer role for the birthday child, a dolphin-themed cake and a decorated table. Extra-guest rates are $32.95 and $49.95, plus tax. No outside food, balloons, pinatas or small children's toys are allowed in the park, so plan the party around what the package includes.
The Middle Keys: Marathon and Grassy Key
Florida Keys Aquarium Encounters (11710 Overseas Highway, Marathon) sells a party at $35 per guest. That includes a diver greeting, a portion of stingray, tarpon and fish food per child, two hours in a party area, an all-day park pass and cupcakes. The page says 7 to 50 guests, a 25 percent non-refundable deposit, and booking at least 10 days ahead. Add-ons per guest are Nursery Encounter $10, Lagoon snorkel $25, Stingray Cove $50, Coral Reef snorkel $75 and a Shark Bites food package $10.
City of Marathon pavilions. The city's page says pavilion requests are first-come, first-served and should reach the city a week or more before your date. The request form covers the pavilions at Sombrero Beach, Rotary Park and Marathon Community Park (City of Marathon). The form lists no fee, so ask when you call (305) 743-6598. Rules on the form: no amplified music before 10 AM or after 8 PM, and music must not be audible beyond the park; no glass; no helium balloons; alcohol is prohibited unless approved; only blue painter's tape may be used for decorations.
Sombrero Beach is open 7 AM to dusk with a playground, volleyball and showers. Nesting season runs April through October, and no RV or bus parking is allowed (City of Marathon). Nonresident parking fees appeared only in a search summary of a Keys Weekly article, so check the city's page before you go.
Dolphin Research Center (Grassy Key) lists general admission at $37.50 for adults and $26.50 for children, with free admission for toddlers. Programs include Meet a Dolphin at $71.50 per person, Dolphin Splash at $159 and Dolphin Encounter at $259, each including general admission. We did not find a birthday-party package on the page, so ask whether a group booking is possible.
The Turtle Hospital (mile marker 48.5, Marathon) is an educational tour of a working sea-turtle rescue hospital. Its homepage does not list prices, so call before you plan on it.
Marathon library community room. A search-result summary of the Monroe County Public Library calendar lists a first-floor community room at the Marathon branch used for community-led activities. We did not find a published reservation policy for private parties, so call to ask.
The Lower Keys and Key West
Mini golf, indoors and out
Boondocks on Ramrod Key (mile marker 27.5) has an 18-hole caveman-themed course with waterfalls. Mini golf is $14.99 for adults and $11.99 for kids. The Ultimate Party Package is $24.99 per child and includes one round, a tenders or slider meal with fries and a soda, a decorated Party Zone for two hours and a goodie bag; you bring the cake. It is the closest Lower Keys match for a classic kid party.
Elev8 Indoor Golf in Key West offers interactive indoor mini golf in a private, air-conditioned simulator bay with clubs included. Prices are $45 for 60 minutes (1 to 2 players), $65 for 90 minutes (up to 5 players) and $80 for 2 hours (up to 5 players). Groups of six or more reserve both bays for a bay-versus-bay match. Weekday mini-golf play opens after 6 PM and weekends are open through the day, so a weekday after-school party will not fit; plan a weekend.
On the water and in the garden
Key West Tiki Boat rents private tiki boats for birthdays with up to 11 of your friends, with a double waterslide, life vests, shade, music and water toys. Rentals run 2 to 8 hours, and a full refund is offered if you cancel 24 hours ahead. Pricing is on the company's pricing page, so request a quote. Check the boat's swimming requirements before booking for younger kids.
Key West Tropical Forest & Botanical Garden (Stock Island) describes the Meadows as a grassy area for tents and activities with an on-site playground. The Nature Chapel is the garden's only indoor venue, for 50 to 80 guests, with all events ending by 11 PM. Pricing is by request (venue page); birthdays are among the events the garden lists on its events page.
Key West animals and attractions
Key West Butterfly & Nature Conservatory on Duval Street is open daily 9 AM to 5 PM with last entry at 4:30. General admission is $17.50 before sales tax; check the page for the local, senior, military and child rates. We did not find a party package on the page.
Key West Aquarium at Mallory Square lists general tickets from $15.99, with a touch tank and daily feedings. It is a good visit for a smaller group, but Mallory Square is not a party space.
A closed attraction. The NOAA Florida Keys Eco-Discovery Center in Key West is temporarily closed while NOAA evaluates findings from a recent structural assessment (NOAA). It normally has free admission, but do not plan a visit until NOAA reopens it.
City and county parks in Key West
- Astro City Children's Park (100 Atlantic Blvd): the city's facility page lists ten pavilions, twelve barbecue grills, a playground, showers and courts, with hours from 6 AM to 11 PM. No fee or reservation process is published. Call the Parks & Recreation contact at 305-809-3767 (City of Key West). A search-engine summary we saw called Astro City a county park, but the City of Key West lists it as its own, so ask the city.
- Bayview Park: a pavilion, playground and courts, open 7 AM to 11 PM. No fee or process is published (City of Key West).
- Smathers Beach: open sunrise to sunset with restrooms from 7 AM to 6:30 PM, volleyball nets and showers. Metered parking is $5 an hour. The city's pavilion-repair project is listed as pre-construction, and the city lists no pavilion reservation, so treat Smathers as a beach day, not a pavilion party (City of Key West).
- Higgs Beach is a Monroe County park, not a city park, per the county's use-of-property policy (county policy).
- Special events: the city's Special Events Division lists a $200 fee plus a $150 application fee and asks for applications 60 days ahead. The page does not say whether a small private birthday needs this permit, so do not budget it until the city answers.
- Naval Air Station Key West: the base's Beachside Pavilion guidelines (January 2023) list a base fee for three hours plus an hourly rate, for families with base access. Confirm current rates with the base's recreation office.
Lower Keys state parks
Bahia Honda State Park (Big Pine Key) charges $8 per vehicle (2 to 8 people) plus $0.50 per person, $4.50 for a single occupant and $2.50 for a pedestrian, bicyclist or extra passenger. No pavilion price is listed on the fee page. Curry Hammock State Park (Marathon) charges $4.50 for one person up to $9 for eight people in a vehicle. Fort Zachary Taylor Historic State Park (Key West) charges $6 per vehicle plus $0.50 per person, $4.50 for a single occupant and $2.50 for a pedestrian or bicyclist, and the fort closes at 5 PM.
Shelters, beaches and state parks: who says yes to what
Short answer on blasters: no agency page names toy blasters, so call to confirm. That holds for Monroe County, the City of Key West, the City of Marathon and the Village of Islamorada. We read each agency's own pages and found no sentence about foam-dart blasters, so none of them has said yes or no in writing. What the pages do say is below.
| Agency | What it says | Fee or process | Who to call |
|---|---|---|---|
| Monroe County Parks & Beaches (unincorporated Keys) | Bounce houses and inflatables are not allowed on athletic fields, beaches or courts; privately owned water inflatables are not allowed anywhere; stakes to secure tents or bounce houses are prohibited; no smoking; alcohol needs approval (county policy) | Shelters $40 a day; use fee by group size; a group of five or more must apply and be approved | (305) 453-8748 |
| City of Key West | Astro City and Bayview list pavilions; no rules page names toy blasters or inflatables (Astro City, Bayview) | No pavilion fee or process published | 305-809-3767 |
| City of Marathon | Request form rules on music, glass, helium balloons, alcohol and decorations; Marathon asks you to check its inflatable policies (City of Marathon) | First-come, first-served; no fee listed | (305) 743-6598 |
| Village of Islamorada, Founders Park | No alcohol, glass, smoking or personal grills; no loud amplified music (Founders Park rules) | Pavilion rental is for village residents; entry $10 adult, $7 youth for non-residents | 305-853-1685 |
| Florida state parks (Pennekamp, Bahia Honda, Curry Hammock, Fort Zachary Taylor, Long Key) | Rule 62D-2.014 bars "devices which fire a dart or projectile" | Pavilions at Pennekamp: $32.25 and $53.75, plus entry | The park office |
Monroe County, in detail
Monroe County's Parks & Beaches Department runs shelters, ball fields and beach parks from Key Largo to the Lower Keys. The county's use-of-property policy, updated February 2025, is the document to read before you plan anything (Monroe County use-of-property policy).
- Fees: shelters are $40 a day. When you reserve a portion of a park or beach, the policy sets a use fee by group size: $25 for 1 to 25 people, $50 for 26 to 50 and $100 for 51 to 100, with a per-person charge above that. Clean-up fees are $0 for 1 to 25 people, $50 for 26 to 50 and $100 for 51 to 100. A birthday for 12 kids and their parents will usually land in the first or second tier. (Monroe County policy)
- Process: the policy says a group of five or more organizing a game or party must apply and be approved. You submit a Request for Use form and a notarized hold-harmless agreement at least 5 business days ahead. Approval is in writing, and the county may decline a request. Fees are non-refundable, and the county does not take cash.
- Fields and community rooms: fields and courts are $10 an hour, or $25 an hour with lights; community rooms are $20 or $40 an hour. (Monroe County policy)
- Commercial use: it is not permitted at several county parks, including Key Largo Community Park, Old Settlers, Big Pine Community Park, Bernstein, Pine Channel, Higgs and Friendship Park. A family birthday with a shipped kit is not a commercial event, but say so when you ask.
- Properties it covers: Bernstein Park, Big Pine Community Park, Higgs Beach, Friendship Park, Harry Harris Park, Key Largo Community Park, Veterans Memorial Beach at mile marker 40, Old Settlers Park, Wilhelmina Harvey Park, Pine Channel Park, Rowell's Waterfront Park and Watson Field.
- Phone: the Parks & Beaches Department's Marathon office is reachable at (305) 453-8748. Ask which shelter is nearest your address and whether a foam-dart game is acceptable there.
State parks are different
Florida's state park rule, 62D-2.014, says no person may use or openly display in a state park weapons such as air rifles, slingshots and "devices which fire a dart or projectile." A foam-dart blaster fires a dart. This is our reading of a public rule, not legal advice. Do not plan a blaster game inside Pennekamp, Bahia Honda, Curry Hammock, Fort Zachary Taylor or Long Key, and confirm with the park if you plan anything beyond a beach picnic (Rule 62D-2.014).
If you want a yes in writing
Call the number in the table, give your headcount and ask three things: whether a foam-dart game is allowed, whether a family birthday with a shipped kit counts as "commercial," and what the fee is. If an agency says no, a yard, pool deck or covered patio at your rental is the simplest alternative.
Staying at a rental? Parties for visiting families
Many Keys birthdays happen at a rental house, with cousins who flew in and grandparents who are not local. A few things make that easier:
- Check the rental's rules first. Vacation rentals in unincorporated Monroe County have their own noise and occupancy limits, so check your rental's rules and the host's guest limit before you invite a crowd (the county's vacation-rental program is listed on the Monroe County site).
- Ask about packages. If you plan to have anything shipped to the house, ask the host or front desk whether they accept deliveries.
- Use the pool deck or covered patio. Sunscreen, water and shade matter more than props. A carport or garage is a simple rain plan.
- Keep it short in the sun. Many families start with the games in the cooler morning and save cake for the shade.
Rain-proof and no-venue ideas
The Keys have fewer indoor party venues than the mainland, and several are far from the Lower Keys. Plan around what exists:
- Pinfish Entertainment (Tavernier): duckpin bowling, arcade and party bookings. Price not published.
- Elev8 Indoor Golf (Key West): indoor mini golf from $45; air-conditioned and rain-proof.
- Key West Tropical Forest & Botanical Garden (Stock Island): the Nature Chapel, pricing by request.
- County community rooms: $20 or $40 an hour. Ask which room is available near you.
- Your own space: a garage or covered patio is the simplest rain plan for an active party.
We did not find a published indoor party package with a price in Marathon or the Lower Keys beyond those above. That is not proof that none exists. Call local businesses and community centers if you need one.
No venue and no booking beyond supplies are needed for these ideas:
- Beach scavenger hunt (where allowed). Make a checklist of shells, sea glass and driftwood. Check each beach's rules first; Sombrero Beach, for example, has sea-turtle nesting areas and limited zones from April through October (City of Marathon), and nothing from marked nesting areas should be disturbed.
- Pool deck relay party. Team colors, a relay course and a few game cards make a simple pool-deck party. The kit described below includes camo netting.
- Snorkel-and-cupcakes at an aquarium. Florida Keys Aquarium Encounters' party package adds a lagoon snorkel for $25 more per guest or a coral-reef snorkel for $75 more per guest.
- Sunset picnic and flashlight hunt. Hold the party at your rental in the early evening and finish with a hunt after dark. Many Keys parks close at sunset, so check hours first.
- Craft and cake in a community room. A library or county community room ($20 or $40 an hour) fits crafts or a movie party. Ask about availability.
Hosted Nerf parties: who really comes to the Keys
Very few hosted Nerf operators list the Keys on their own sites. Here is what we could confirm from each operator's own page on October 26, 2026.
| Operator | Keys service | Price | Source |
|---|---|---|---|
| Battle Party Rentals | Lists "Monroe County, Key Largo" at the edge of its radius; Marathon, Islamorada and Key West are not listed | Site says starts at $545 for a Nerf party with an inflatable maze; not confirmed by phone on 10/26 | Battle Party Rentals |
| Mobile Gaming Events | Its page says it serves all of Florida and names no Keys city; by phone on October 26 it said Orlando and South Florida, so the Keys are not confirmed | Not published | Mobile Gaming Events |
| Bounce & Blast | Based in Longwood; the Keys are not named | $55 to $295 depending on package and page | /nerf-games ($185/$225/$295), /nerf ($55/$145/$235) |
| Pop-A-Nerf | Its FAQ lists a service area from Spring Hill to Port Charlotte and from Orlando to St. Petersburg; service area not confirmed for the Keys | $550 to $595 | Pricing ($595), FAQ ($550) |
| Birthday Battle Box (ours) | Ships to the Keys; no host | $199 (8 players) or $259 (12) | Fact sheet |
For a hosted party, call the operator, give your exact address and ask in writing whether they travel there and what the travel fee is. On Battle Party Rentals, staff told us by phone on October 26 that they do not offer the Nerf party in Central Florida; the Keys were not asked, so the site's Key Largo listing is unconfirmed.
Bounce houses are a different product. We Rent Fun, a Miami company, lists Marathon and Key West in its service area, with bounce houses starting at $379 and water slides at $599 and $699. It says a delivery fee applies in the Keys and units shut down in winds over 15 mph. Remember that county parks bar inflatables on beaches, fields and courts, and Marathon asks you to check its inflatable policies.
Our pick for active kids: Birthday Battle Box (a shipped Nerf party kit)
Birthday Battle Box is our own product, one option among many above. Here is exactly what it is.
| Kit | Players | Price | Rental | Shipping | Source |
|---|---|---|---|---|---|
| Birthday Battle Box | 8 | $199 | 7 days | Free both ways | Fact sheet |
| Birthday Battle Box | 12 | $259 | 7 days | Free both ways | Fact sheet |
- What it is: a do-it-yourself Nerf party in a box. No host, no staff, no Florida location and no pickup; it only ships. Ships free both ways from Richmond, VA. Your box arrives by the Thursday before your party. Return it to UPS by the following Thursday with the prepaid label inside. Enter your ZIP and party date to see the earliest available weekend.
- Inside (fact sheet): one Nerf Strongarm blaster per player plus two backup Strongarms, 1,000 darts, safety glasses, team pinnies, a laminated game guide plus 7 game cards, favors, camo netting, and a reusable box with a prepaid UPS return label. The box is 18 x 14 x 14 inches and 30 lb. Setup takes minutes: no batteries and no assembly.
- Dates: the site's how-it-works page describes arrival on the Thursday before, a Friday-to-Sunday party and a UPS drop the following Thursday.
- Policies: Move your party date for free if rain changes your plans, even after the box arrives. Email bookings@birthdaybattlebox.com to arrange the new date and return instructions; cancel 14 or more days ahead for a full refund; lost darts are free and a destroyed blaster is $35 (FAQ, terms).
- Returning it from the Keys: UPS lists The UPS Store at 1107 Key Plaza in Key West (Ground drop-off until 5:00 PM), 5409 Overseas Highway in Marathon (until 5:30 PM) and 101425 Overseas Highway in Key Largo (until 5:00 PM), plus CVS Access Points in Key West and Key Largo. Check hours the week you ship. More on the Florida Keys / Monroe County page.
What it costs, side by side (and the math for 12 kids)
| Option | What you get | Price | Source |
|---|---|---|---|
| County shelter | A shelter for the day, plus the per-person use fee | $40 a day; $25 for 1 to 25 people | Monroe County |
| Pennekamp pavilion | Small or large pavilion | $32.25 or $53.75, plus entry | Florida State Parks |
| Key West or Marathon city pavilion | Pavilion | Not published | Key West, Marathon |
| Islamorada Founders Park | Entry; pavilion rental is for village residents | Free for residents; non-resident entry $10 adult, $7 youth | Founders Park |
| Boondocks | Mini golf, food, party zone | $24.99 per child | Boondocks |
| Elev8 Indoor Golf | Private bay | $45 to $80 | Elev8 |
| Aquarium Encounters | Feeding, party area, cupcakes | $35 per guest | Aquarium Encounters |
| Theater of the Sea | Show admission for 10 | $650 plus tax | Theater of the Sea |
| Bounce house delivered to Marathon | Inflatable, delivery fee extra | From $379; Keys delivery fee by quote | We Rent Fun |
| Hosted Nerf, Key Largo | Crew and inflatable maze | From $545 (site price; not confirmed by phone) | Battle Party Rentals |
| Bounce & Blast (Longwood; Keys not named) | Hosted Nerf packages | $55 to $295 depending on package and page | /nerf-games, /nerf |
| Pop-A-Nerf (Keys not confirmed) | Hosted Nerf party | $550 to $595 | Pricing, FAQ |
| Shipped Nerf kit | 8 or 12 players, 7 days, no host | $199 or $259 | Birthday Battle Box |
The math for 12 kids, cheapest first. These are our arithmetic from posted prices, before tax, tips, food and extras:
- A backyard or rental-house party with the shipped kit: $259 for the 12-player kit (fact sheet).
- Boondocks: about $300, which is 12 children at $24.99 and includes food.
- Dolphin Research Center admission: about $318, which is 12 children at $26.50, admission only, since we did not find a party package.
- County shelter plus the kit: about $324, which is $40 for the shelter plus a $25 use fee, $65 for the space, plus the $259 kit, if the county approves the blasters, and before food and cake.
- Aquarium Encounters: about $420, which is 12 guests at $35.
- Theater of the Sea: about $716 plus tax, which is the $650 package for 10 plus two more children at $32.95 each.
- Hosted Nerf from Battle Party Rentals: from $545, if they travel to the Keys (site price; call to confirm).
- Bounce house: from $379, plus the Keys delivery fee (We Rent Fun); county parks bar inflatables on beaches, fields and courts.
A calm countdown and a budget that holds
| When | What to do |
|---|---|
| 4 to 6 weeks before | Pick a date and a backup date. Request a Monroe County shelter at least 5 business days ahead (county policy) and ask the agency about blasters. Aquarium Encounters parties need 10 days' notice (Aquarium Encounters). |
| 3 weeks before | Send invitations (our free invitation maker tracks RSVPs and player counts), and ask guests to flag allergies. |
| 1 week or more before | Order the kit if you are using one; the shipping timing is in the kit section above. |
| Party week | Run through the game cards and house rules with the other adults. |
| Party day | Hand out glasses and pinnies, pick a game, have an adult referee. |
| The following Thursday | Pick up what darts you can, pack the box and drop it at UPS with the prepaid label. |
Keeping the budget in check. Fix the head count first, because most Keys venues price per guest. Ask every venue what is included before you compare, since food, tax and tips change the totals. Park shelters look cheap until the use fee and clean-up fee are added, so read the tier table. Weather and storms are the real wildcard, so choose a backup date or a roofed backup and keep deposits refundable where you can.
Questions Keys parents ask
How much does a kids' birthday party cost in the Florida Keys?
It depends on the venue. Boondocks is $24.99 per child, the Aquarium Encounters party is $35 per guest, a county shelter is $40 a day plus a use fee, and Theater of the Sea is $650 plus tax for 10 guests. Tax, tips and deposits are extra at many places.
When is the best time of year for an outdoor birthday in the Keys?
Hurricane season runs June 1 to November 30, and summer afternoons are hot and stormy even without a named storm. Many parks close at sunset, so a morning party is the safest outdoor bet. Plan shade, water and sunscreen, and check the school calendar before you fix a date (district calendar).
How far ahead do I book Keys venues and parks?
Key West's special-events office asks for applications 60 days ahead and lists a $200 fee plus a $150 application fee, but does not say whether a small private birthday needs one (Key West special events). Aquarium Encounters needs 10 days' notice and a 25 percent non-refundable deposit (Aquarium Encounters). Monroe County wants its Request for Use and notarized hold-harmless at least 5 business days ahead (county policy), and Marathon asks pavilion requests a week or more ahead (City of Marathon).
Can I reserve a park pavilion in Monroe County?
Yes, through the county's request process. A group of five or more organizing a party must apply and be approved, with a Request for Use and a notarized hold-harmless submitted at least 5 business days ahead. Shelters are $40 a day plus a per-person use fee (county policy).
Are Nerf blasters allowed in Keys parks?
Not confirmed: no agency page names toy blasters; call to confirm. That covers Monroe County, the City of Key West, the City of Marathon and the Village of Islamorada. Florida state parks, including Pennekamp, Bahia Honda, Curry Hammock and Fort Zachary Taylor, ban devices that fire a dart or projectile under rule 62D-2.014, so do not plan a blaster game in one (Rule 62D-2.014). This is our reading of a public rule, not legal advice.
Can I use a bounce house at a Monroe County park?
Not on athletic fields, beaches or courts. Monroe County's policy bars bounce houses and inflatables there and bars privately owned water inflatables anywhere (county policy). Delivered inflatables also shut down above 15 mph winds (We Rent Fun).
Can a non-resident rent a pavilion at Founders Park in Islamorada?
The park page says the tiki huts and large pavilion are available to rent to village residents for small special events, so a visitor should call to ask whether a rental is possible. Non-residents pay $10 for adults and $7 for youth and seniors at the gate, and a December 2025 fee exhibit shows different figures, so confirm the price by phone at 305-853-1685.
Can I hold a birthday party at Smathers Beach in Key West?
Treat Smathers as a beach day, not a pavilion party. Metered parking is $5 an hour (Smathers Beach). The city lists no pavilion reservation, and the pavilion-repair project is listed as pre-construction (City of Key West).
Is there a garden or outdoor venue with a playground in Key West?
The Key West Tropical Forest & Botanical Garden on Stock Island describes the Meadows as a grassy area for tents and activities with an on-site playground, and the Nature Chapel as its only indoor space, for 50 to 80 guests. Events end by 11 PM and pricing is by request (venue page).
Does Dolphin Research Center host birthday parties?
We did not find a birthday-party package on its page. General admission is $37.50 for adults and $26.50 for children, and toddlers are free (Dolphin Research Center). Ask whether a group booking is possible.
What is the best rainy-day birthday option in the Keys?
Pinfish Entertainment in Tavernier (duckpin bowling, arcade and party bookings; price not published) and Elev8 Indoor Golf in Key West ($65 for 90 minutes, up to 5 players) are the two indoor options we found with their own pages. A garage or covered patio is the simplest rain plan for a house party. See Pinfish.
What is the cheapest way to do a birthday party in the Keys?
A backyard or vacation-rental party is the cheapest, since you pay no venue fee; a shipped DIY kit is $199 for 8 players or $259 for 12 (fact sheet). A county shelter adds $40 a day plus the use fee (county policy).
What is a Nerf party?
A Nerf party is a birthday where kids split into teams, wear safety glasses and play foam-dart games. A company can host it, or you can run it with a shipped kit; ours is $199 for 8 players or $259 for 12 (fact sheet).
Can I rent Nerf guns for a birthday party in Key West?
Yes. Birthday Battle Box ships a rented Nerf party kit, no host, for $199 (8 players) or $259 (12) (fact sheet). Ships free both ways from Richmond, VA. Your box arrives by the Thursday before your party. Return it to UPS by the following Thursday with the prepaid label inside. Enter your ZIP and party date to see the earliest available weekend.
How much is a Nerf party in the Florida Keys?
A hosted party starts at $545 on the Battle Party Rentals site, the only hosted operator whose site lists any part of the Keys (Key Largo); staff said by phone on October 26 that they do not offer the Nerf party in Central Florida, and the Keys were not asked, so call to confirm (Battle Party Rentals). Bounce & Blast lists $55 to $295 depending on page (/nerf-games, /nerf) but is based in Longwood and does not name the Keys. Pop-A-Nerf lists $550 to $595 (pricing, FAQ) and its service area is not confirmed for the Keys. A shipped DIY kit is $199 or $259 (fact sheet).
Is there a Nerf party company that serves Key Largo, Monroe County?
Battle Party Rentals is the only hosted Nerf company we found that names a Keys city. Its own South Florida page lists Key Largo in Monroe County as the edge of its 90-mile radius and says its Nerf party starts as low as $545 (checked Oct 26, 2026). Marathon, Islamorada and Key West are not listed, and we could not confirm service by phone, so confirm with the company before you book. Mobile Gaming Events says it serves all of Florida but names no Keys city; confirm delivery to the Keys.
Does UPS deliver to the Florida Keys?
Yes, the kit ships by UPS Ground to the Keys. Ships free both ways from Richmond, VA. Your box arrives by the Thursday before your party. Return it to UPS by the following Thursday with the prepaid label inside. Enter your ZIP and party date to see the earliest available weekend. Check your ZIP on the Florida Keys / Monroe County page.
What is included in the Birthday Battle Box kit?
One Nerf Strongarm blaster per player plus two backup Strongarms, 1,000 foam darts, safety glasses, team pinnies, a laminated game guide and 7 game cards, favors, camo netting and a reusable box with a prepaid UPS return label (fact sheet). Setup takes minutes: no batteries and no assembly.
What if it rains, a storm hits, or we need to cancel?
Move your party date for free if rain changes your plans, even after the box arrives. Email bookings@birthdaybattlebox.com to arrange the new date and return instructions, and a cancellation 14 or more days ahead is a full refund (FAQ).
What about hurricane season in the Keys?
Hurricane season runs June 1 to November 30 (National Hurricane Center). Pick a backup date and call vendors early if a storm is forecast. Birthday Battle Box publishes no hurricane-specific policy, so contact the team early; storms can slow UPS.
How much space and how much time does the Nerf party kit need?
The fact sheet does not list a space requirement or a party length; check the fact sheet, then confirm with bookings@birthdaybattlebox.com before you order (fact sheet). For comparison, hosted Nerf parties are listed at 60 minutes to 2 hours.
Which Keys venues include food in the party price?
Boondocks' $24.99 per child includes one round of mini golf, a tenders or slider meal with fries and a soda, a two-hour Party Zone and a goodie bag; you bring the cake (Boondocks). Aquarium Encounters' $35 per guest includes cupcakes, animal food and a party area (Aquarium Encounters).
What does the Aquarium Encounters party include, and what are the add-ons?
The $35-per-guest party includes a diver greeting, a portion of stingray, tarpon and fish food per child, two hours in a party area, an all-day park pass and cupcakes for 7 to 50 guests. Add-ons per guest are Nursery Encounter $10, Lagoon snorkel $25, Stingray Cove $50, Coral Reef snorkel $75 and a Shark Bites food package $10. Book at least 10 days ahead with a 25 percent non-refundable deposit (Aquarium Encounters).
Can I bring outside food or balloons to Theater of the Sea?
No. The park does not allow outside food, balloons, pinatas or small children's toys, so plan around what the package includes. The $650 package covers 10 guests, and extra-guest rates are $32.95 and $49.95, plus tax (Theater of the Sea).
Can I book a private boat for a birthday in Key West?
Key West Tiki Boat rents private tiki boats for birthdays with up to 11 of your friends, with a double waterslide, life vests, shade, music and water toys. Rentals run 2 to 8 hours, and a full refund is offered if you cancel 24 hours ahead. Pricing is by quote (Key West Tiki Boat); check the boat's swimming requirements for younger kids.
Does a weekday after-school party work at Elev8 Indoor Golf?
Probably not. Weekday mini-golf play opens after 6 PM and weekends are open through the day, so plan a weekend. Prices are $45 for 60 minutes (1 to 2 players), $65 for 90 minutes and $80 for 2 hours (up to 5 players), and groups of six or more reserve both bays (Elev8).
What are Pinfish Entertainment's hours in Tavernier?
Monday to Thursday 4 to 9 PM, Friday 4 to 10 PM, Saturday noon to 10 PM and Sunday noon to 8 PM (Pinfish). The party page lists no price, so call before you plan (party page).
What are the hours at Key Largo Community Park?
The park is open 7 AM to 9:30 PM, and pavilion reservations go through the county's Key Largo office (Key Largo Community Park). Ask the county about blasters before you plan a game there.
What do Keys state parks charge for entry?
Pennekamp is $8 per multi-occupant vehicle plus $0.50 per person up to 8 people, $4.50 for a single occupant and $2.50 for a pedestrian or bicyclist (Pennekamp). Bahia Honda is $8 per vehicle plus $0.50 per person (Bahia Honda), Curry Hammock runs $4.50 to $9 (Curry Hammock) and Fort Zachary Taylor is $6 per vehicle plus $0.50 per person, closing at 5 PM (Fort Zachary Taylor).
Does the Key West Butterfly & Nature Conservatory host parties?
We did not find a party package on its page. It is open daily 9 AM to 5 PM with last entry at 4:30, general admission is $17.50 before sales tax, and it closes at 2 PM on Thanksgiving (conservatory).
Can I use the Naval Air Station Key West pavilion?
Only families with base access. The base's Beachside Pavilion guidelines (January 2023) list a base fee for three hours plus an hourly rate, so confirm current rates with the base's recreation office. We did not verify a current price.
Sources
All sources were checked on October 26, 2026.
Birthday Battle Box: Fact sheet · FAQ · How it works · Order · Safety · Games · Terms · Florida Keys / Monroe County page
Government and agencies: Monroe County use-of-property policy · Key Largo Community Park · Monroe County vacation-rental program · City of Key West Astro City · Bayview Park · Smathers Beach · Smathers pavilions · Key West special events · City of Marathon pavilions · Sombrero Beach · Islamorada Founders Park · Founders Park rules · Founders Park fee resolution · Pennekamp · Bahia Honda · Curry Hammock · Fort Zachary Taylor · Rule 62D-2.014 · National Hurricane Center · Monroe County School District calendar · NOAA Eco-Discovery Center · Fantasy Fest · Visit Florida Keys
Shipping: UPS Key West · UPS Marathon · UPS Key Largo
Venues: Boondocks · Elev8 Indoor Golf · Pinfish · Florida Keys Aquarium Encounters · Theater of the Sea · Dolphin Research Center · Key West Butterfly & Nature Conservatory · Key West Aquarium · Turtle Hospital · Key West Tiki Boat · Key West Tropical Forest & Botanical Garden
Nerf and party-rental competitors: Battle Party Rentals · Mobile Gaming Events · Bounce & Blast /nerf-games · Bounce & Blast /nerf · Pop-A-Nerf pricing · Pop-A-Nerf FAQ · We Rent Fun · StrikePoint Laser Tag
Birthday Battle Box home: birthdaybattlebox.com
More Florida guides: Florida hub · South Florida · Southwest Florida
Next steps
- Comparing it with a venue? See our Nerf party rental boxes.
- Sending invitations? Make a free Nerf party invitation that tracks RSVPs and player counts.
- Choosing activities? Explore Nerf party games.
- Wondering about timing? See how delivery and returns work.
- Ready to reserve? Check your date and delivery ZIP.