Does anyone have a recommendation on how to use plaster of paris with a
class? I would like to make molds of their hands but I had a bad experience
when I used it
with the 7th graders. I made a huge batch and it hardened before I got it
out of the bucket.
It was a mess. My niece has one she did in pre-school and my sister loved
it. NO clue on how
to organize something like this???