## Pages - [Kids Martial Arts in Cranston, RI | Junior Ninjas & Warriors](/pages): Kids martial arts classes in Cranston, Rhode Island for ages 4-12. Junior Ninjas and Warriors build confidence, focus, coordination, fitness and practical self-defense. - [The System Martial Arts & Fitness | Kids Martial Arts in Cranston, RI](/home): Kids martial arts, fitness and practical self-defense in Cranston, Rhode Island. Helping children grow stronger inside and out. Schedule a Complimentary Student Assessment.