With the Chuckit Jr!, you can throw that ball out of the ballpark over and over again. Made of lightweight, durable plastic, the Chuckit Jr! uses a standard-size tennis ball and is designed for hands-free pickup, so you NEVER have to bend down and pick up a slimy ball again. With a little practice you can consistently throw the ball 100 feet. Caustion: Read instructions before use. High-speed flying tennis balls can cause injury. Do not use product to aim or throw directly at people or animals. not for indoor use. Use only standard tennis balls. Be alert, ball may travel in unanticipated directions. Adult supervision recommended for children.