I think this is a great book for kids, mostly girls if they are struggling on how to accept their physical appearance. This book, I think, shows a message that you should be happy with just the way you are and not changing yourself because of what people might think and what you think of yourself. In Joyce's case, the main character, she's not happy with her eyes.
I'm a 15-year-old girl and I enjoyed this book. It's age appropriate, and had a very good lesson. It's telling you that you don't need to change yourself to be "pretty enough", and that you're fine the way you are.