How do you handle the dust problem? Are they all wearing little masks or is there
some way around this?
Susan Holland wrote:
> that plaster mixture is 3 parts vermiculite, 2 parts plaster and 2 parts plus a
> little extra water. I am doing this activity with sixth graders now. I found
> that if I used pints as my measuring unit, then I would be able to fill three
> pint size molds with each "batch."