The Petmate Doskocil Crazy Circle is 360 degrees of fun that'll bring out the kitten in any cat! This tubular plastic track holds a ball-and-bell toy for kitty to poke at and chase through paw-sized openings. These fun toys will drive cats crazy as they bat the ball around the circle trying to get it out! Made of durable, long-lasting, easy-to-clean plastic. No batteries required, cat powered!