Yellow Sun is a wonderful book for pre-k through 2nd grade to help learn the planets of our Solar System. I wrote this book while teaching 1st grade. We were doing a unit on the Solar System and I realized there were not a lot of resources for younger students. All the students worked together to draw the illustrations for the book. Children readily learn through the rhyme and repetition format and can relate to the whimsical drawings created by peers their own age. As a follow up you can have your students draw and create their own keepsake version of the book.