Ages 5 to 9 years. This informative book introduces young readers to the defining characteristics of the various groups of animals that make up the animal kingdom. The bodies of many animals, including several types of mammals, fish, reptiles, birds, and arthropods, are described in simple, easy-to-understand text. Children will learn about: invertebrate and vertebrate animals; warm-blooded and cold-blooded animals; how animals move; the habitats of different animals; and how various animals find food.