The ball track cat toy is one level higher than similar products; one level more, one more ball, more fun. The top is upgraded with 360 ° trackball and new way to play for your cat! [4 Layer Play Maze Ball Toy Upgrade] It has one layer more than most trackballs. The higher the level, the more balls, the more interesting the cat. Removable design: removable, easy to install and to clean. [Catnip / Bell Upgrade] 4 layers, each layer has a ball, one is a catnip ball and the other is a flashing bell ball. Cats like it better! An active cat can play ball all the time! [Several ways to play, not boring] There is a hole at the top. You can insert the tail of the mouse and lose weight by playing with the cat. This way of playing can make the cat more fun! [Non-slip rounded corners floor] We use safe, non-toxic and environmentally friendly polypropylene PP resin, which is odorless, wear-resistant and has good impact resistance. The corners are smooth with no burrs. The cats can play it safe!