"I'm a big wide mouthed frog and I eat flies," says the frog to the other animals, "Who are you and what do you eat?" Then he meets a crocodile and learns an important lesson, to keep his wide mouth shut, hop away to live another day. A colourful picture-book version of a popular playground joke."I'm a big wide mouthed frog and I eat flies," says the frog to the other animals, "Who are you and what do you eat?" Then he meets a crocodile and learns an important lesson, to keep his wide mouth shut, hop away to live another day. A colourful picture-book version of a popular playground joke.