We believe at CrossFit Prototype that fitness should be fun. Our kids gym is one of the most unique and fun birthday party places around, so why wouldn’t you want to have your child’s birthday here with us?! Simple fill out the form below to learn more.

What’s Included?

  • Group kid fitness in our kids gym, lead by a CrossFit Prototype Kids Coach
  • Interactive warm up
  • Team-building games
  • Obstacle courses for kids
  • Creating a fun fitness environment for kids
  • Bottles of water for all kids
  • Full use of our gym for kids (the space will be yours when your party is going on!)
  • Brain-based activities per our Ignite! Program

*You are welcome to bring food for the kids kids. We have tables that we can set up to accommodate food and presents.


  • 5-15 kids — $250
  • 16-20 kids — $300
  • Over 20 kids? Contact us for a price quote

*We have a max limit of 20 kids per group!


  • 4-12 years old

Check out some pictures from our kids party place below!

How to get Started: Please fill out the form if you would like to contact us

Get Started

  • This field is for validation purposes and should be left unchanged.
   CrossFit Prototype is Located at 50 East Main St in Westborough MA, 01581 *The session will run 75-90 minutes **Please have waiver forms filled out ahead of time. Our waiver form is located on the bottom right of the screen!