The story overall was good, and I feel that the target audience (younger readers) will enjoy it and its message. I liked that it seemed possibly to be a story about bullying, but in the end it was really about the ability to laugh at yourself. Not everyone laughing is doing it to be mean.
The only small issue I was having is with the wording on the story. Most of it followed a rhythm and rhyme, which is a common technique and almost essential with picture books. There were, though, a few pages where the rhythm was thrown off by the word usage. Still, it was minor, but something of note for this type of book.
The illustrations worked well with the story and are sure to be pleasing to young readers, as well.