SmartyKat Marble Mouse Rolling Marble Cat Toy. Designed with a weighted ball base that allows the toy to glide across the floor with a swipe of a paw or a light push, with a wobbling motion that simulates the movement of real prey to stimulate your cat's hunting instincts. Encourages cats to give chase, pounce, swipe, and swat, engaging them in physical activity that transforms playtime into exercise to help improve your cat's health and fitness. Features soft felt ears and a long dangling tail; the toy shape and mix of materials simulate the look and multitextured feel of real prey to help stimulate your kitty's hunting instincts and entice play. 5.5 In. x 2 In. x 1.5 In.