Ultra lightweight, yet very strong. KIN-BALL® balls consist of a tough nylon cover with a lively, lightweight bladder. The unique bladder makes them bouncy and much more lively than a cage ball. Use KIN-BALL® balls as you would a cage ball or play the game they were originally designed for. The game is played by 3 teams of 4 players each, plus a referee. The court is limited only by your gym walls and ceiling. The KIN-BALL® game is fast moving and based on sportsmanship and cooperation. Ages 9 to adult. Sold complete with cover and one bladder. 33" Multicolor KIN-BALL® ball.