Ultimate Ninjas in O'Fallon is a premier Ninja gym that offers a range of activities for kids and adults. They provide kids classes, preschool classes, open play sessions, birthday parties, after-school programs, camps, and competitions. The gym is designed and led by American Ninja Warriors who train to conquer obstacles seen on the NBC hit show, American Ninja Warrior. They focus on building self-confidence, agility, and overcoming obstacles while having fun. For adults, they offer fitness programs and corporate or private events. Ultimate Ninjas has a positive and supportive environment where everyone can challenge themselves and have a great time.