Have the Scouts paint one side of the wheel. After it has dried, paint the other side in a similar or different pattern. We often send messages without meaning to do it. People can see how we feel by our frown or smile, or by a shrug of our shoulders. Such facial expressions and gestures are called body language.
Animals use body language, too.
When a dog's tail is wagging, you know it is happy. When a cat arches its back, or bares its claws, you know it is prepared to fight. White boards and dry markers are especially useful for this game. Here's a list of Charades words to use. The telephone is a communication tool.