“The world’s your pups oyster with the Zippy Burrow Pearls in Oyster from the Madden the Mermaid storybook collection. Simply stuff the pearls into the shell and watch doggo dive into the oyster in search of hidden treasures! Once your playful pup has discovered all the precious pearls, they’ll be begging you to put them back in again and again for hours of fun. It’s the perfect interactive toy for keeping your dog busy and engaged through hide-and-seek play that prevents boredom and promotes mental stimulation.” Burrow measures 7” X 7” X 4”. Set includes one oyster burrow and three squeaking pearls with one small squeaker in each Pearl.