This book highlights all the classes of animals; mammals, fish, birds, reptiles, amphibians, and even invertebrates such as arthropods. This is great for introducing a child to the wonder of the natural world. Ever wonder what makes a mammal a mammal? and why a jellyfish isn't a real fish? This book provides easy to understand answers for children aged 2-9. With high-quality full color photos of various animal species, this is a great book to spark a love for animals. Provides a brief introduction to basic zoology, animal classification, and biology.