I had NO idea what to do, so I went to summer camp, got out paints, pipe cleaners, gems, markers, and ketchup (!) and explained the rules.
I broke the kids into groups and had them elect a group leader. Then then had to talk in their groups for 5 minutes about how they were going to use the materials to decorate their group leader's face.
They were not allowed to cover the eye area. I really didn't give many rules and was expecting mass chaos, but it wasn't too bad! It was nice to see them use their creativity in fun ways.
Here are some pictures of the process:
And here were some of the results:
The kids were having so much fun that the 'adults' had to join in on the action, too: