Patent pending 120-degree rotating pivot disc spins smoothly like a "Lazy Susan" enabling children to silently twist and turn. Gives kids the continuous movement they love while sitting providing an outlet for excess energy improving concentration. Ever changing positions provide sensory input, and calm kids who can't sit still including those with ADD, ADHD, or autism. Non-skid base keeps it secure on a chair or the floor as the cushion turns freely. Comfortable cushioned heavy-duty vinyl seat is easy to wipe clean. Versatile, lightweight, and easy to carry. Great for school and home. Maximum weight: 300 lbs.