Deep pressure applied when sitting, lying across or leaning on the ball, calms, relaxes and quiets kids giving a sense of security and well-being. Soothing effect relieves anxiety and restlessness and improves concentration and behavior in the classroom and at home. Used as a chair the dipped sitting "saddle" position enables greater stability than a traditional ball chair while developing balance and coordination. Provides sensory comfort and therapeutic support for all kids including those with ADHD, motor delays, autism, and sensory processing disorders. Sitting, bouncing, and rocking front to back and side-to-side strengthens muscles and help develop core strength. Includes pump, 2 stoppers, and a stopper remover. Measures 36" x 20" (91x51cm). Maximum weight of 350 lbs (159 kg). Recommended age 5-18+ years