This toy attachment will encourage your cat to play independently. It has Hook Velcro on the end which attaches to the Loop Velcro sewn on the corner of Sheer Fun. Lay it on the ground with Sheer Fun on top of it. Cats will have fun pouncing on it and batting it across the floor, exposing the ball and hiding it again. It's made with parachute cord and a golf Wiffleball. This is a sturdy product, but play must be supervised. Store away from your cat when not in use. Sheer Fun For Cats sold separately.