SmartyKat Skitter Critters Plush Catnip Mice Cat Toy. A tantalizing pack of irresistible catnip mice your cat will love to carry, bat, hide for an ongoing game of hide and seek. These little perfectly sized, lightweight mice give your kitty the exercise they need. 50% filled with pure and potent catnip and the fluffy fiberfill is spun from 100% recycled plastic. Stimulating cat toys attract cats with catnip to engage them to frolic, romp & play. Most cats respond to catnip with a burst of energetic activity followed by a calm mellow period.