This book is about a little frog who is very unhappy about being a frog. He talks with his dad about other animals he would rather be, and his father repeatedly tells him he can't be those animals because he is a frog. Then, a dog (or wolf) comes along and tells the frog he should be glad he's a frog because he likes to eat all the other animals. The little frog then realizes that he is happy being a frog and not someone else.
I would read this book in my lower level classes. The students could write about all the things they like about themselves, or they could write the frog a letter to persuade him that frogs are, in fact, pretty cool. It could also go with a small science lesson about frogs, since they mention some of the characteristics of a frog.