The Guide: Kids’ Birthday Party Venues in Hunterdon County, NJ
How to Use This Guide
This guide lists places in Hunterdon County that publish a children’s birthday party package on their own website — a package name, a price, or a party page. Each row shows the venue, its town, what kind of place it is, which age groups its published information covers, the lowest published party price, whether the venue describes a private room, how many guests the published package covers, and what the venue says about food.
The three age columns are ticked only from what a venue publishes: a stated age range, a minimum age, or a party product aimed at that age group. A venue that publishes no age gets no tick and the Ages cell reads Not published. A tick means the venue’s own words cover that age group; a blank means they do not say. Prices are the lowest figure a venue publishes for a children’s party and change often, so treat them as a starting point and confirm when booking.
Below the Hunterdon County table is a second table of venues over the county line, within a 25-mile drive of Flemington, that pass the same test. The second table is sorted alphabetically, not by distance. Venues that take parties only by request, with nothing published, are not listed.
About This Guide
This guide is produced by Garden State Circle. Venues appear here because they meet the criteria described above — a children’s birthday party package published on the venue’s own website, in Hunterdon County for the first table and within a 25-mile drive over the county line for the second, and a website of its own. That is a test, not a judgment, and it is the only route onto this page. No business can pay to be included in this guide, to be listed higher, or to change what the table says about it. Businesses are listed alphabetically, and every detail in the table was verified against each business’s own website or Google Business Profile in October 2026.
Everything under the heading that begins this guide is governed by the rules above, on every guide we publish. Garden State Circle is supported by the businesses that participate in it. Participation pays for our ongoing work: keeping a business’s entry accurate, re-checking its record, and publishing a page of its own details that the business maintains. There is no paid placement in this guide. Participation does not buy a place here, a position here, or anything the comparison table says. Where a row carries a verification date, that is when we last checked that business’s record ourselves. A row without one has not been checked recently — that is a fact about our work, not about the business.
Garden State Circle is published in New Jersey by Tiffany and Jake Slowinski and covers Hunterdon County. Contact the publisher at jake@gardenstatecircle.com. How every guide is made, in one place: how every guide is made.
The Party Venues, Compared
| Venue | Town | Type | 3 & under | 3–10 | 10+ | Ages, as published | Party packages from, as published | Private room, as published | Max guests, as published | Food, as published | Website | Record checked |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Bounce City | Ringoes | bounce | Not published | Not published | Private Party: the entire facility is closed to the public; Open Bounce Party: play area open to the public | Not published | Staff serve food and cut cake; outside cake, cupcakes, fruit tray and beverages allowed; catering menu available | bouncecitynj.com | October 2026 | |||
| Deer Path YMCA (River Crossing YMCA) | Flemington | pool party | ✓ | ✓ | Ages 4 yrs+ | $456 members / $570 non-members (Splashin’ Bash, Saturday 5–7 PM) | Splashin’ Bash includes 30 minutes in a party room; held after hours on Saturdays | 25 guests maximum | Not published | ymcarivercrossing.org | October 2026 | |
| Gravity Vault Flemington | Flemington | climbing (chain) | ✓ | ✓ | kids ages 5 and up | $350 (Package 1, up to 10 participants) | A half hour in the party room | Up to 10 participants at the base price; $35–$42 each additional | Package 2 adds 2 slices of pizza per climber, beverages and paper products | gravityvault.com | October 2026 | |
| Nex Level Ninja | Flemington | ninja | ✓ | ✓ | Ages 5+ | Not published | Not published | Not published | Not published | nexlevelarena.com | October 2026 | |
| Northlandz | Flemington | model railroad museum | ✓ | ✓ | ✓ | Kids admission ticket: age 2–11 years | Not published | Not published | Not published | Not published | northlandz.com | October 2026 |
| The Paint Party Studio | Flemington | art studio | ✓ | ✓ | Age 5 and up suggested | Not published | Not published | Not published | Guests may bring cake and pizza; every party includes cotton candy making | thepaintpartystudio.com | October 2026 |
Towns, ages, prices, room, guest and food wording are each venue’s own, taken from its own website in October 2026. Not published means the source we read does not say. A tick in an age column means the venue’s published information covers that age group.
Nearby options over the county line
These venues sit outside Hunterdon County but within a 25-mile drive of Flemington, and each publishes a children’s party package on its own website. Town only is shown; distances vary by where in the county you start.
| Venue | Town | Type | 3 & under | 3–10 | 10+ | Ages, as published | Party packages from, as published | Private room, as published | Max guests, as published | Food, as published | Website | Record checked |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alstede Farms | Chester | farm | great activity for all ages | $299 (Animal Lover Party, weekdays) | Reserved outdoor tent area | Up to 15 children on the Animals and Activities packages | Not included on the Basic Rental; catering available separately | alstedefarms.com | October 2026 | |||
| Amazing Escape Room Princeton | Princeton | escape rooms (chain) | Not published | $100 per hour (party-space rental) | Not published | Not published | Bring your own food, beverages and supplies | amazingescaperoom.com | October 2026 | |||
| Bounce Air Adventure Park | Somerset (Franklin Township) | trampoline / adventure park | ✓ | ✓ | ✓ | Guests 4 & under must be accompanied by an adult; most attractions 5 years of age and over | $479 (Party Starter, up to 10 participants, $40 each additional) | 30–40 minutes in a private party room | Up to 10 participants included; $40 each additional | 4 pizzas (12″) and 2 two-liter sodas | bounceairadventurepark.com | October 2026 |
| Branchburg Sports Complex (PlayMaze) | Branchburg | soft play inside a sports complex | ✓ | ✓ | ✓ | Ages 3-12 | $449 (up to 12 guests incl. birthday child; $29 each additional) | Not published | Priced for up to 12 guests; $29 each additional | 3 large cheese pizzas, fountain drinks, bakery cupcakes, $10 arcade card per child | branchburgsports.com | October 2026 |
| Cakewalk @Candyland Crafts | Raritan | cake decorating | kids, tweens, and teens | Not published | Private party space | Not published | Pre-baked cakes, cupcakes, cookies or decorating projects; buttercream and supplies provided | candylandcrafts.com | October 2026 | |||
| The Center for Contemporary Art | Bedminster | art studio | ✓ | ✓ | children ages 5 to 15 years old | $375 ($350 Family Members) for up to 12 children; $25 each additional | Not published | Maximum of 15 children | Center does not provide food; parent supplies cake, drinks, plates and cups | ccabedminster.org | October 2026 | |
| Circle Bowl & Entertainment (Piscataway) | Piscataway | bowling | Not published | Not published | Private party rooms | Not published | Not published | circlebowlpiscataway.com | October 2026 | |||
| Colonial Bowling & Entertainment | Lawrenceville | bowling | We host kids, teen, and adult birthday parties | $36.99 per guest (Cosmic Bowling Party; 10-guest minimum) | Private party room with packages | Minimum 10; maximum 24 (Cosmic), 20 (other packages) | 2 plain pizzas and 1 water per guest included | colonialbowlingnj.com | October 2026 | |||
| Color Me Mine Princeton | Princeton | pottery painting (franchise) | Not published | Not published | Not published | Not published | Not published | princeton.colormemine.com | October 2026 | |||
| Kids Empire Manville | Manville | soft play (chain) | ✓ | ✓ | ✓ | kids ages 1–12 | $32.90 per kid (Play Your Way); Play Big $48.90 per kid | Reserved tables in the open play area (no private rooms); 2½ hours dedicated seating | Not published | Drinks and goodies in packages; outside food and drinks not allowed with general admission, including cake | kidsempire.com | October 2026 |
| Lucky Strike North Brunswick | North Brunswick | bowling (chain) | Not published | Not published | Not published | Not published | Not published | luckystrikeent.com | October 2026 | |||
| Oakwood Lanes | Washington | bowling | Not published | Not published | Not published | Not published | Not published | oakwoodlanes.com | October 2026 | |||
| Princeton Playspace | Princeton | play space | children of all ages | $645 + tax (Basic Princeton) | Classic Genius package ($845 + tax) includes private use | Up to 15 children plus the birthday child; extra children for a fee | Pizza and water or juice for children included | princetonplayspace.com | October 2026 | |||
| Slocum’s Bowling, Bar, and Grille | Ewing | bowling | ✓ | ✓ | Pre-schoolers to 5-year-olds; 1st to 5th graders; 6th grade and up | $15.00 per child (Little Gal’s/Guy’s Package, 10-child minimum) | Not published | Not published | Food included per package (chips, drink, grilled cheese or pizza) | slocums.homestead.com | October 2026 | |
| Space Play Academy | Hillsborough | soft play | ✓ | ✓ | ✓ | Kids ages 0–12 | $495 + tax | Astro Explorer and Galactic Adventurer: semi-private; Intergalactic Legend: private, the entire facility | Astro Explorer 20 guests (min 10 kids); Galactic Adventurer 30 (min 15); Intergalactic Legend 64 (min 32), up to 96 | Pizzas included by package (3, 4 or 8 large); cake included on the two larger packages; $50 fee for outside food on the first two | spaceplayacademy.com | October 2026 |
| Tumbles of Princeton | Princeton | gymnastics (franchise) | ✓ | ✓ | ✓ | kids ages 1-12 years old | $570 + tax (TumbleZone Party, 1.5 hours) | Party space for cake, food and beverages | 15 guests plus the birthday child; $15 each additional | One drink per child plus plates provided; family brings food | princeton.tumbles.net | October 2026 |
| Ultimate Xscape Rooms | Somerville | escape rooms | ✓ | we recommend ages 12+ for parties | Not published | Every room is private | 2 to 10 players per room; 11 to 20 can reserve two rooms | Food and drinks are not permitted at the venue | ultimatexscaperooms.com | October 2026 |
Towns, ages, prices, room, guest and food wording are each venue’s own, taken from its own website in October 2026. Not published means the source we read does not say. A tick in an age column means the venue’s published information covers that age group.
Common Questions
Why are some age columns blank?
A blank means the venue does not publish an age for that group. Many venues write “all ages” or nothing at all; neither earns a tick. Call the venue if the age range matters for your group.
Why is a venue I know not listed?
Either it publishes no children’s party package on its own website — parties by request only — or it has no website of its own, or it is more than 25 miles from Flemington. Venues that read as closed on their Google listing are also left off. If a venue has since published a package, write to us and we will check it.
Do the prices include everything?
No. The price shown is the lowest a venue publishes for a children’s party, usually for a set number of children. Extra guests, food add-ons, themes, deposits and tax are typically extra; the Max guests and Food cells show what the venue says about that.
What does “private room” mean here?
It is the venue’s own description of where your party sits — a private room, a reserved table in an open play area, the whole facility. Where a venue describes nothing, the cell reads Not published.
Are chains and franchises included?
Yes, on the same test as everyone else. The Type cell says (chain) or (franchise) where the venue’s own website shows it.
Page built and verified: October 2026.
Additional Resources
Things to Do With Kids in Hunterdon County, NJ — the reader page for the county, with open play days and hours as each venue publishes them.
Kids’ Birthday Party Venues in Somerset County, NJ — the neighboring county’s party page, on the same test.
Something out of date?
This guide is maintained. If anything here is wrong or has changed — a name, an address, a service, or whether a shop has closed — tell us and we will check it. Businesses listed here are welcome to write in directly.
To correct an entry, email the publisher with the venue’s name and a link to the page on its own website that shows the change. We check it and update the row.
admin@gardenstatecircle.com
This is not a ranking.