Cancor Mini Crinkle Catnip Treated Cat Toy Balls, 8-Pack Catnip treated cat toy mini-crinkle balls are perfect sized for your kitten They are a mini version of the original crinkle ball Crinkle balls are a great activity toy for your new cat or kitten It has a crinkle sound just like a mouse walking through leaves The crinkle sound drives cats crazy and they must have it