Sidewalk chalk

Here's a fun recipie  for Sidewalk chalk - by Lennie

1 cup of plaster of paris
½ cup of cool water
3 tablespoon of liquid powder tempura paint

Pour plaster into a clean container (like a coffee tin or ice cream tub).
Using a disposable stir-stick, stir in most, but NOT all, of the water.

Add 2 tbsp of the liquid tempera paint, mixing well, especially at the bottom; add another tbsp of paint if you think it needs it.

Add a little more water as the mixture thickens.

Stir well and pour into small containers, like bathroom cups or plastic popsicle molds.
Peel off paper or squeeze out of molds as it dries, and after it dries let the kids play with it.