Attach the clamp to the top of any doorway, turn the dial to adjust the length of the string, and then serve up hours of active fun. Your goal is to hit the ball back to your opponent every time without missing - But more than a game, Door Pong is a fascinating, skill-strengthening activity to enjoy with a friend. It enhances hand-eye coordination, concentration, reflexes, cooperation, and more... Open the door to a truly ideal active-play delight with Door Pong!