Kids stay calm and attentive while sitting as the Wiggle Seats give them an outlet for excess energy in the classroom, during meals, and at homework time. IMPROVE FOCUS: Allows kids who have trouble sitting still to quietly move while working enabling them to concentrate better and be more productive SENSORY: Flexible nubs on one side and smaller bumps on the other give a choice for just the right amount of calming tactile stimulation PORTABLE: Ergonomic disc offers a convenient alternative to balance balls with the same benefits, including improved posture. A great fit for kid's seating on chairs, benches, or directly on floors CUSTOMIZABLE: Firmness can be customized to contour exactly to each child's needs Easy-inflation pump included 13"/33cm Safety tested