Interactive: When the cat touches it, the built-in sensor starts to vibrate the fishtail so that it wiggles like a live fish. Cats love to hunt a toy that moves on its own. Catnip: Filled with pure and potent catnip, 100 % safe, non-toxic. Did you know that more than 70% of cats are affected by catnip? 3D Printed: Washable, durable and comfortable PP cotton. Easy and safe to carry in mouth. USB Rechargeable: No need to buy extra batteries, and the detachable motor helps to make cleaning easier!