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Serving Middlesex County and Surrounding Areas

3 Stories of Tubes and Tunnels

40’ long 8’ high rockwall for lots of fun and adventures.

The Ultimate Indoor Playground

The perfect place for kids to be kids!

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Contact Us Today

We can’t wait to have fun with you!

Why Choose Us?

  • Our programs are centered around enhancing each child's self-esteem
  • Encouraging fitness in a fun and safe environment
  • Comprehensive Indoor playground

The Premier Family Fun and Fitness Destination in Eastern Massachusetts


New for the 2020-21 School Year . . . . OSF Academy Remote Learning Program

There is so much uncertainty with the coming school year.  Will your child be going in-person, hybrid, remote?  Will you have choice?  We want to help.

For the 2020/21 school year, we have started the OSF Academy to provide a remote learning space for a limited number of students.  All programming will take place in our 18,000 sq. ft. facility in Westford, Massachusetts.

Each enrolled student will receive:

  • A dedicated, personal work station at which to perform his/her school work (including power and Wi-Fi)
  • Supervision by experienced staff and instructors
  • Opportunities for classes and other physical activities in our spacious gymnastics/ninja facility
  • Lunch/snacks available (or bring your own – no nut products please!)
  • A safe, supportive environment in which to navigate the coming months.
  • The opportunity to make some great friends along the way.

Full-Day Programming: 8:30 to 3:00 p.m.

  • Monday to Friday – $799/mo.
  • Monday to Wednesday or Wednesday to Friday – $599/mo.

Half-Day Programming: 8:30 a.m. to 12:30 p.m.

  • Monday to Friday – $450/mo.
  • Monday to Wednesday or Wednesday to Friday – $300/mo.

After School: 3:00 p.m. to 6:00 p.m.

  • Monday to Friday – $375
  • Monday to Wednesday or Wednesday to Friday – $250/mo.

Questions or don’t see an option that will help your family?  Give us a call at 978-692-9907.  Enrollment is limited and the program begins on September 14th.  If you are interested in reserving a spot, please complete and return this OSF Academy Application to


For the Winter/Spring of 2021, we are offering:

  • The OSF Academy Remote Learning Program for students involved in remote learning this semester
  • Ninja and Gymnastics Classes
  • Team Gymnastics
  • Private Birthday Parties and Events
  • Parent Night Out events

** Daily admissions will return soon . . . . stay tuned for details


Encouraging Fitness in a Fun & Safe Environment

At One Stop Fun, our main goal is to provide a fun and active environment for your children. Our entire team believes in creating a fun space with activities that boost self-esteem and encourage fitness. We are fully committed to providing a high-quality experience to all of our customers and we want every customer to have a safe and fun time. We are fully equipped with a number of outstanding amenities such as an advanced Ninja training rig, outdoor Olympic-size pool, zip line, three whole stories of tunnels and tubes, foam pit, traverse rock wall and more. Call us at (978) 692-9907 to request more information about our classes and services. Click here for our 2020-21 Gym and Class Schedule.


We also provide a wide assortment of programs, activities, and services including: Whether your child is taking a class, exploring the three stories of tubes and tunnels in our Ultimate Indoor Playground, or climbing our indoor rock wall climbing structure, you will love your time at One Stop Fun. Our wide array of offerings is sure to spark the enthusiasm of children of all ages, interests, and skill levels. Spend some time enjoying our unique and comprehensive indoor playground for an entire day or just a few hours. When your child wants a break from playing our snack bar provides delicious options for lunch or just a snack to recharge the batteries.

Plan a Visit to One Stop Fun Today

We have a committed staff that is dedicated to creating a positive and enriching environment for your children while they are here. As always, adults and children under one are free when you come to our Westford facility. Contact us at (978) 692-9907 to register for a class, to book a visit, or to request more information about any of our other activities or options!

We Are a Nut-Free Facility

We are a completely nut-free facility. Out of respect for our customers with nut allergies, we do not sell or allow products containing nuts in our facility. Please, no outside food or drinks allowed without prior authorization by management. Thank you for helping us keep everyone safe, healthy and happy!


  • Gymnastics

  • Tunnel

  • Pool