Beeztees Cat Toy Hedgehog is made of wonderfully soft plush. What makes this hedgehog extra fun is that the belly can be filled with balls made of catnip. The hedgehog comes with 3 catnip balls. For example, when the spell of one ball has worn off, you can add a new catnip ball via the velcro closure. By adding the catnip, most cats will be even more encouraged to play with this awesome cat toy from Beeztees.