Help children to realize that human beings can tell stories with their bodies without saying or writing a word.

Begin by using your own body taking different stances, making various gestures and using distinctive facial expressions.
Each time you change your position ask, "Can you read me?"

Then divide the class into small groups and have them plan pantomimes of popular TV commercials, especially those that involve children.

Suggest "body language" dramas in which the class tries to guess what the participants are saying.

Excellent sources for pantomime are fairy tales and athletic events.