Sidewalk Chalk

     Materials:

• Plaster of Paris
• small paper cups
• powdered tempera paint

In a large container with a tight lid, combine two cups of Plaster of Paris with one cup of powdered tempera paint. Any strong, bright colour of paint will work. Close the lid and shake well.

Have the children spoon three tablespoons of the paint and plaster into a small paper cup. Add one or two spoonfuls of water and stir well. The mixture will be the consistency of pancake batter. Add more water if necessary. Set the cups aside for about one hour to allow the plaster to set. Peel away the paper cup and the chalk is ready to use.