STACKABLE AND STRONG CONSTRUCTION: This cat toy is made of ultra-sturdy and tear-resistant PP to withstand frantic cat scratching action, removable multi-layer construction for easy cleanup, and non-slip pads to prevent the product from rolling over. So it's perfect for one or more cats. SPINNING BALLS KEEP CATS BUSY: Cat toys stimulate cats' senses and hunting instincts, which will increase their sensitivity and won't persecute the furniture in your home. KEEP AWAY FROM LONELINESS: This toy provides hours of exercise and self-entertainment for health care and eliminates boredom and pet depression because your cat can play by himself when the owner is not at home. PLAY TOGETHER: Two or more cats can play with this toy together, which will make the cats happier and enhance their friendship. REMOVABLE 4 LAYERS: Multi-layer durable carousel interactive cat toy with a cute cat head shape on the top layer. Fun to entertain your cat for hours.