Nerf Dog 3.5in LED Bash Ball - Green, Dog Toy Lights up: LED lights make this toy even more fun after dark Interactive: one of a kind colorful lighted toy that will keep your pet playful and engaged for hours Perfectly Sized: 3.5-inch ball is great for medium sized dogs Textured hexagon pattern on outside make this ball easy to grip when slobber Ridges on ball make it easy for your dog to pick it up