What Is Choo Choo?: Choo Choo Is a Cat! This is the story of an adorable grey and white stray kitten, that found a home, and is now on a mission. The mission is to help raise money so that he can assist some of the animal organizations in finding and providing loving homes to animals in need. In addition, Choo Choo would also like to raise money to help assist some of the Lion and Tiger organizations so that the bigger cats do not become extinct. Choo Choo will have a series of books, that will include his life, his brothers and sisters, and how and where he will donate 50% of all of his profits that are generated from his books.