Building Twentyone World Ninja Sport is excited to announce the completion of a new Ninja Gym at Building Twentyone in Holt, Michigan....

World Ninja Sport builds the biggest Ninja Summer Camp Course in the World! See the behind the scenes video of our team.

We are a week away from installing the world's largest Ninja Warrior Camp! This sprawling ninja course will be built in Cleveland, GA and...

How are your Ninja hands?! One of our ninja students is doing such a great job at getting her little calluses. You can see the work that...

Building a ninja obstacle course in your backyard is an awesome way to stay fit and have fun at home! But there are A LOT of variables to...