Who would ever forget the lovable singing trio of Alvin, Simon and Theodore, popularly known as Alvin and the Chipmunks? They are well known for their high-pitched voices which are the sounds that real chipmunks make. Chipmunks make high pitched sounds like chirping birds and they use this as their defense against their predators or when looking for a mate. But this is not the only sound they make. Find out more in this wonderful book designed to...