This colorful, child-sized 45cm Balance Ball is a fun way to encourage kids to build a healthy posture, improve balance, and get the "wiggles" out. The constant ball movements increase blood flow to the brain, leading to better focus. Ideal for ages 5-8 and includes an easy inflation pump. Not compatible with the Kids Classic Balance Ball Chair. Child-sized 45cm balance ball Encourages kids to build a healthy posture Constant movements to get the "wiggles" out Includes an easy inflation pump Measurements: 45cm. Materials: PVC