Grand Central Publishing sent me a copy of this book for review (thank you). It's coming out in June, check with your local bookstore. It's illustrated by Paul S Heath
If you have a small one and a dog he or she is not sure about, this book can give you an avenue to talk about dogs. It would also work well as an introduction to the idea of getting a dog for your family.
Any child with an interest in animals will enjoy this book.