The Champion Sports Swing Ball Set offers a fun cardio exercise for kids and adults that can be played alone or competitively in a group. Simply slip your foot through the ring and start swinging the corded ball with your ankle; the aim is to keep jumping over the ball and cord without missing a jump or stepping on the cord. Made of durable plastic; this set of six swing balls is easy to use, clean and maintain. *Fun cardio game for all ages*Lightweight plastic ball swings easily without hurting ankles on impact *Cord is 18" Long and is durable but gentle on legs for added safety *Ankle ring is 5.5" Diameter slips over most feet easily *Set of 6 (1 of each) Green, Orange, Purple, Red, Royal Blue and Yellow.