The Charming Pets Unbelieva-Ball Fox Dog Toy is the perfect dog toy for interactive fun! LIGHT IT UP: Includes a spikey light-up dog ball for your dog to find in the cute plush shell. Includes batteries. Batteries not replaceable. INTERACTIVE FUN: Maximize the bouncing fun with the engaging lights of the durable spikey dog ball. BOREDOM BUSTER: 2 toys in 1 equals double the fun! Watch as your dog uses problem-solving skills to remove the ball from the outer shell, then toss for a game of fetch. DURABLE DOG BALL: Made of K9 Tuff Guard, an interior layer of super durable materials that create a powerful protective shield.