Sorry. I keep 6 kids, so do 6 handprint ornaments and maybe 12 pinch pots/animals per year with it. I don't think I'd use 25 lbs in 10 years. :: It is a hardish grey clay that dries whitish. The preschool kids don't really enjoy working with it so it is very adult led. Think parent gift.
I use it much the same as plaster of paris projects. I do those a few times per year, as well.
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