JW Cat Crazies Cat Toys drives cats crazy with their unique and lightweight design. Made from durable and lightweight plastic; JW Cat Crazies gives your cat something to hunt and chase while engaging your cat's instinct to hunt and catch their prey. So lightweight; they'll glide; bounce; and roll across almost every surface. As your cat bats at them; they'll go skittering across the floor providing spontaneous movements that drive cats wild! Bright colors make them easy to find and they are perfectly sized for your cat to carry off to hide. For the most fun; use on hard surfaces.