The Disc 'O' Sit Cushion provides children with the movement they need while staying seated! A round inflated rubber seating cushion which is great for promoting correct seated posture, and/or for providing sensory input during seating for sensory regulation. Ideal for mat time as well as for desk work. May be used as a stepping stone in gross motor activities. A benefit of the disc'o'sit cushion, compared to other options, is that the amount of inflation can be adjusted by simply removing the stopper to release air, or blow air in, and replacing the stopper. Adult disc diameter 39cm. Junior disc diameter 32cm.