To develop foot and leg coordination. Requires the combination of different leg movements (rotation, skipping, hopping) in an attempt to continuously twirl a ball tethered to one leg. Built strong with an ankle ring and funball. Set of 6 colours (one of each in red, orange, yellow, green, blue and purple). Ankle ring is 5.5" D and slips over most feet easily . The cord is 18" long and is durable but gentle on legs.