The extra 3-pack of balls pair with the TRIXIE Catch the Balls Track Tower and most cat circle track toys. These replacements balls are great to have in case the originals balls get lost or damaged. They allow your curious feline ample opportunities to use those hunting instincts to go after its prey. These ping pong balls can also be on the loose throughout your home. Cats and kittens go bananas for the unpredictable ricocheting nature of lightweight balls when bounced, rolled, and chased after. Key Benefits: These extra 3-pack balls pair with the Catch The Balls and Crazy Circle cat toys Interactive cat track toys help keep your indoor cat physically active and mental stimulated Cats love a good game of chase so keep extra balls on hand because you never know where these balls can end up Stimulate your cat's hunting instincts to swat, bat, chase, and pounce on the lightweight balls
