I am not grateful! Grateful I am not!

I am not grateful! Grateful I am not! is a book about a boy and his pet mouse. The boy has all the toys you can think of having. He has great clothes, sneakers, and an amazing house to live in, however, the boy is not grateful for what he has. Throughout the book, his mouse friend attempts to remind him to be grateful but the boy struggles. Will the boy eventually become grateful for what he has? You must get the book to find out ending.