The Party Tennis dog ball consists of 3 colorful tennis balls made of white-based fabric with colored polka dots. Each ball has a colored band in the center with the words "It's my Birthday" in various colors. Inside, there is an interactive whistle that will entertain your dog immensely. The product can be used to take wonderful souvenir photos of your furry friend to share with your friends. The toy is part of the Pet's Party line, an entirely birthday party-themed collection that contains everything that could make their party delightful! Cute and original: ideal for taking wonderful souvenir photos to share with your friends. All products in the line are ideal for taking fun and sweet souvenir photos of your pet in the company of their furry friends.