This is a very cute and fun to read book. The bright colors and fun wording are sure to keep young pre-readers tuned in. The lesson about cooperation blends nicely into the book along with learning the colors of a rainbow and some minor math. The fun facts at the end of the book are a bit redundant but I doubt the little ones would care. The formatting was a bit clunky on my ereader. I received an evaluation copy in exchange for my honest opinion.