This book is so illustrative and exciting to read! The use of the sparkly fins on each page really grabs the attention of children when they see it. I think this story has a great message of sharing to make friends. The lexile level for this book is AD410L. I think this would be good for a 1st grade classroom. An activity that would be fun for the students would be creating their own "rainbow fish" to display in the classroom and having items listed on the fins that they would share with their friends! I could see a lot of possibilities with this book in the classroom and it is an enjoyable read!