Nasco Rubber molds of animal footprints. The molds are highly detailed and show the animal's unique characteristics.
Things to teach with this are almost endless:
molds and casts of fossils
what fossils teach us
animal adaptations (foot)
chemical reaction (plaster)
Casts are dry in about two hours, so I was able to pop out the first class before the second class came. This gave everyone a good choice of molds to choose from.
We used eye loupes to examine my small fossil collection and made inferences about where they may have been found.
Day 2: Paint, Let Dry, and Take Home