ProKadima is great fun and exercise anywhere you go! The ProKadima needs no net, court or other accessories. It is a game of coordination and cooperation involving two players trying to maintain a volley without allowing the ball to hit the ground while gradually increasing the distance between them. The ProKadima Smash Ball Set features 3 spare balls. The balls are specially designed low resilience balls in high visibility colors. Smashball sets come on a hang tab cardboard with 3 balls in 3 different colors.