Petstages Tower of Tracks Cat Toy 3 BALLS SPIN & ROLL - This addictive cat toy is designed with 3 levels of tracks and 3 brightly colored balls SPINNING BALLS KEEP CATS BUSY - The Tower of Tracks cat track toy stimulates your cats senses and hunting instincts STACKED & STURDY CONSTRUCTION - This track cat toy is durably built with a closed top and is perfect for one or more cats BAT & CHASE BALLS FOR NON-STOP PLAY - A non-slip base holds The Tower of Tracks in place as your cat plays so the fun won't quit MENTAL & PHYSICAL FUN - This cat track toy is a great way to help your cat get much needed daily exercise and excitement