9 Lives the Morris Signature Collection - Rattle &#39;N Roll Balls, 3 Pack (1 Pack) Since cats are natural predators, they love to hunt! The Rattle 'N Roll Balls Spins easily with swipe of paw , Excellent way to interact with your cat and encourage exercise Perfect to keep kitty entertained , Hours of play. Tacky surface for easy handling, Lightweight and perfect size Designed to help provide a therapeutic activity