Have you ever seen a pink polar bear? Or a violet lion? The author/ illustrator has created a charming picture book with vivid watercolor illustrations for children to learn the names of animals and colors of the rainbow. Follow a grandma and her grandson Calvin on a trip to The Rainbow Zoo. As they visit each animal, right before their eyes the animal suddenly transforms to a color of the rainbow - with a little surprise. The narrative is written in simple rhyme using repetition making it easy for children to join in with the last line of each page.