What is elmer is coming?

"Elmer is Coming" is a children's picture book written and illustrated by David McKee. It was first published in 1987 and has since become a popular classic in children's literature. The story follows the character of Elmer, a patchwork elephant who is different from the other elephants in his herd. His colorful and unique appearance often causes him to feel self-conscious and isolated. However, the story takes a positive turn when the other elephants find out that Elmer is coming to visit, and they celebrate his differences by decorating themselves in wildly colorful patterns similar to Elmer's. "Elmer is Coming" is a heartwarming story about accepting and celebrating differences, making friends, and finding self-confidence.