Billy Twitters never takes his mother seriously when she threatens to buy him a blue whale if he does not clean his room or eat his vegetables. After all, a blue whale is longer than thirty dogs lined up nose to tail, and its tongue weighs as much as four hundred cats. Where would you even keep a pet like that? But one morning, Billy wakes up to find a massive, water-spouting blue whale blocking his entire street. Suddenly, he is the proud owner of the biggest animal on earth, and he has to take it with him absolutely everywhere he goes. You will laugh as Billy tries to ride his bicycle with a whale strapped to the back and attempts to hide it during school hours. Having the world's largest pet does not make him popular, it just makes his life incredibly complicated. Discover how Billy handles his massive, blubbery new problem.