Your pet will be mesmerized by its round shape and built-in Tippy bottom enabling it to rock back and forth while two balls roll around for interactive fun. It’s middle scratching surface will appeal to a cat’s natural instinct and need to claw. A small packet of catnip is included to encourage playtime. Catnip use is optional. Tippy rocker for rocking interactive fun 2 balls included for more interactive fun Large middle scratching surface Free catnip included