Increase focus and improve posture with a wiggle seat sensory cushion, which offers an outlet for excess energy in the classroom, during meals and at homework time. Allows children to quietly move while working, enabling them to stay on task and be more productive. Flexible nubs on one side and smaller bumps on the other can easily be felt, giving a choice for just the right amount of tactile stimulation. Ergonomic disc causes the body to stabilize itself, which can improve core strength and posture. Can be used on chairs, benches or directly on the floor. Comes inflated, and includes an easy-inflation pump; firmness can be customized to fit your child's needs. 13" diameter size is a great fit for younger children, while being large enough to use as your child grows. For ages 6 and up.