Object: one roller skate

Good morning, boys and girls. (Hold up the one roller skate and ask the question.) What's missing? I only have one roller skate. Have you ever tried to skate with just one roller skate? It's pretty difficult. It's not much fun. I really need the second roller skate to have a good time, don't I? I'm missing my roller skate partner. When you want to play there are some fun things you can do by yourself. There are many things that you need a friend, or a partner to do with you.

Let me tell you a story about a boy your age who went alone to the playground. Let's see what happened to…