Just place this handy cushion on the floor or on a chair—for flexible seating anywhere! Our super-durable vinyl cushion is specially designed to let children wiggle and wobble while they sit…helping kids focus as they move. It features large nubs on one side and small nubs on the other—children simply select the sensory surface they prefer! Cushion is easy to inflate and deflate with our Automatic Ball Inflator (sold separately).