One or two children can sit on the Handheld Rotation Board. The movements can be achieved by simple motions exerted from the waist and arms. The two base mounts (height 1.18" or 1.57") of varied curvatures add more fun and diversity to the games. This item targets the cerebral cortex. Dimensions: 25.98" Maximum Weight: 132 lbs. Ages: 3 years and up.