I LOVE using bug and insect books to teach little kids about this topic. They are a fabulous tool for teaching children about the world they live in. Some of these books are nonfiction and will teach children all about the given insect or bug.
Free Bug Color and Learn Pages! Featuring ten different creepy crawlies, each with their own set of fun facts and fill in the blank writing activity. Great for a Spring Science unit in your Preschool Classroom. Free at PreschoolMom.com
17 Books About Bugs Your Kids Need on Their Bookshelves