The 15 Pieces Small Animal Chew Ball Toy Rolling Activity Play Balls Bunny Treat Ball Grass Ball Pet Cage Accessories for Rabbits Guinea Pigs Chinchilla Teeth Grinding Gnawing Biting (Novel Style) is a great way to encourage your pets to exercise and play. Made of high-quality materials, this set is durable and easy to clean. The set includes 15 pieces in four different styles: four aquatic balls, four aquatic corn husks, four aquatic timothy grass balls, three aquatic coconut silk balls, and one each of rabbits, guinea pigs, hamsters, chinchillas, birds, gerbils, and so on. With its practical function, this set is perfect for encouraging your pets to exercise and play.