Draw people / aliens / animals etc by either drawing head body or legs
Separate children into groups of 3.
Chose subject to be drawn. e.g. futuristic people.
First child draws head without other two children seeing, then folds over paper leaving two small lines visible which represent the neck.
Using the neck as a guide where to start, next child draws the body without the other two seeing. Once again cover leaving only the tops to legs visible
Third child draws legs.
Reveal drawing and compare with other groups