Ninja Kids

Action Athletics, 42 Guest Street, Boston, MA 02135

mapAction Athletics, 42 Guest Street, Boston, MA 02135

About

Ninja Kids offers Ninja Kids Classes for ages 3-18. Classes meet once per week, and most classes are 60 minutes long, with some younger classes for ages 3-5 running 45 minutes.

Programs

  • Ninja Kids Classes — 3-18 · Once per week; 45-minute classes for some younger Ninja Kid classes for age groups 3-5 and some 4-5 time slots; 60-minute classes in most cases · $375–$500 per session

At a glance

  • Ages: 3–18 years old
  • Price range: $375–$500 per session
  • Current session: Fall (Sep 14–Nov 7, 2026); Winter I (Nov 16–Jan 30, 2027); Winter II (Feb 1–Apr 3, 2027); Spring (Apr 5–Jun 7, 2027)
  • General schedule: Classes meet once per week.

About the provider

The program states, “Training can and SHOULD be fun!” It also says the skills and movement patterns covered can be transferred to any sport. Ninja Kids requires a full session commitment, and sessions are 8 weeks long.

  • Kids Open Gym — 6 and up
  • Open Gyms — 5+ · Recommended for ages 5+.
  • Parties & Events — 5+ · Birthday parties, milestones, and team building.

Classes require a full session commitment. Sessions are 8 weeks long. Once enrolled in a class, ninjas are registered for the entire school year with the opportunity to unenroll between sessions. No weekend classes are available. Private classes require a minimum of 6 kids per class and continue for the entire school year (Sept - June).

Last updated August 30, 2026.

Is this your business? There is no cost, but you will be asked to sign up or log in.