Looking for a unique and unforgettable birthday experience? Host your child’s next celebration with us—Ninja Warrior style!
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As one of the only facilities in Eastern Pennsylvania featuring authentic Ninja Warrior obstacles, The Gravity Forge offers over 5,000 sq/ft of Ninja Warrior space and an additional 19,000 sq/ft dedicated to gymnastics. Your child and their friends are in for an action-packed, high-energy party they’ll never forget.
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What’s Included:
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Instructor lead Ninja Warrior obstacles
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Age-appropriate obstacle course races
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Private access to a party room
Each party is designed for children turning age 6 or older, and includes up to 15 participants (birthday child + 14 friends). Parties include 1 hour of supervised gym activities, followed by 30 minutes in our air-conditioned party room, where you’re welcome to bring your own food, drinks, and cake.*
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Food Options:
We partner with Amy’s Pizzeria in Hatboro to provide delicious pizza for your party. You can set a preliminary order in Fullout and then add to it during the week of the party. All orders must be in by the Friday before the party.
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Waiver Requirement:
A signed waiver is required for all participants.
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How do I book a party?
You can view available party times and reserve your spot directly through our online booking calendar.
Click here to book a party
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When are parties held?
Birthday parties are hosted on Saturdays and Sundays during the following time slots:
Saturday:
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2:30 PM – 4:00 PM
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3:30 PM – 5:00 PM
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4:45 PM – 6:15 PM
Sunday:
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11:30 AM – 1:00 PM
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12:30 PM – 2:00 PM
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1:45 PM – 3:15 PM
What should I bring?
We provide tables, chairs, and tablecloths in our party room. You’ll be responsible for bringing all other items, including:
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Decorations
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Food and drinks
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Paper products and utensils
We offer pizza from Amy’s Pizzeria in Hatboro for $17 per pie. Let us know by the Friday before your party if you'd like to include pizza—charges will be added to your final bill.
What does the gym need from you?
Please provide a list of all attending children's first and last names by the Wednesday before your party. This allows us to confirm waiver completion and avoid delays. Any missing waivers may hold up the start of the party.
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What should participants wear?
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Sneakers are required
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Comfortable, athletic clothing is highly recommended
Payment Information
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A $75 nonrefundable deposit is required to reserve your party date
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The deposit is transferable to a different date or time (excluding changes made within two weeks of your original party date)
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Remaining balance is due at the end of the party
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Payment can be made by cash or credit card
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A 3% convenience fee applies to all card payments
1.5 hour Price
1 hr in the gym, 30 mins in the party room
$350
2 hour Price
1.5 hrs in the gym. 30 mins in the party room
(only available for the last timeslot)
$400
* $75 (non-refundable) deposit required for birthday parties
Add ons:
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More Friends- $10/per kid (there is a 25 kid limit)
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Add an extra 30 mins- $50