Materials Needed:
1 Cup Plaster of Paris
1 Cup Water
Powdered Tempera Paint
Instructions:
Find a mold for your sidewalk chalk. You can use small paper cups, toilet tissue rolls, candy molds, etc.
Mix the Plaster of Paris and the water together. For colored chalk, add powdered tempera paint to achieve the color you want. Let stand for a few minutes and then pour into mold.
Set side and let dry completely. This can take anywhere from several hours to a few days depending on the size of the mold you chose. Once dry, remove the chalk from the mold. If it is still moist, let air dry for another 24 hours.
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