The Balance Arch (KP4002-002) makes a half circle. The pieces can be used on their ends or on their sides. Balance exercises are essential elements during a child’s development. The different surfaces provide various textures for playing. The different sizes allow for variation to target specific areas. Please use the product on a padded mat on a flat surface and use the foot sheath to ensure the safety of the game. Maximum Weight: 176 lbs. Ages: 3 years & up.