Gymnic Disc 'O Sit Wobble CushionSupport posture, attention with the Gymnic Disc O Sit. Flat enough to fit into a backpack, the Disco sit cushion can be carried between classes to ensure comfort and focus throughout the school day. For alternative use, place it on the floor to use it as a training tool to perform balance and motion exercises. Gymnic's DiscoSit round inflatable cushion is designed for children. Level of inflation can be adjusted to suit the desired comfort and