Build Physical Strength And Test Your Agility With The Kinderfeets Balance Disk! Crafted Using Non-Timber Bamboo For The Board And Recycled Plastic Bottles And Sawdust For The Base, The Disk Is The Perfect Sustainable Tool For Developing Body Stability, Core Strength, Good Posture And Mind-Muscle Connection. A Top-Surface Grip Layer Offers Traction And Prevents Slippage. Children Can Test Their Balance And Coordination While Developing Important Muscle Groups And Improving Their Concentration Ability. Parents Can Practice Balancing With Good Posture While Working At A Standing Desk, Or A Teenage Sibling Can Attempt Balancing Squats To Develop Core And Lower-Body Strength. Suitable For Ages 2 Years And Older - The Disk Is Fun For The Entire Family! 15.75" Diameter. No Assembly Required.