These hopper balls help develop balance, coordination and motor skills. They have a soft one piece looped handle for safety and are made of super strong, phthalate and latex free vinyl.Color-coded by size for easy identification. 18" Hopper Ball is yellow, for ages 5-7. 22" Hopper Ball is red, for ages 7-9. 26" Hopper Ball is blue, for ages 9-12 .