Assign students to read, or read to them, This is Our House by Michael Rosen. In this book, George, the main character, creates a cardboard box. When other children come and try to play in the box, George turns them away for their outward characteristics. The story teaches students that everyone looks different and it is hurtful when others are treated poorly because they are a girl, have red hair, etc. Have kids create their own "cardboard box," and have everyone go inside it.