KONG Bat-A-Bout Glow's fiber optics shine when cats tap the bowl, illuminating an irresistible undersea world rippling with a rainbow of light as the fibers move, inviting batting and satisfying nocturnal instincts. The wobbly bowl, dangling fish, and fluttery feather movements intrigue while KONG Premium North American Catnip inside the fish extends the fun. Batteries included; on/off switch.