I use plaster craft. I did a few on sixth graders for a museum I had
Body suits would be good. You can wrap the student in plastic wrap. Any
skin...make sure you have plastic wrap...or preferably vaseline.
the kids don't stay still very long. You really have to watch posture to do
front and then back...but that is what I did . The brand of wrap I used is
called Rigid WRap. I dfound that the more athletic they were....usually the
faster it dried...burning calories faster, I guess!