- Cardboard tubes
- Duct tape
- Wax paper
- Tempera paint
- Plaster of Paris (Note: Do not pour Plaster of Paris down the drain. It will set and block the pipes.)
- Plastic spoons
- Disposable containers
- If necessary, cut down cardboard tubes until they are approximately the size of a toilet paper tube.
- Cover one end of the tube with duct tape to hold the chalk inside.
- Loosely roll a 6 x 6 inch sheet of wax paper and insert into the cardboard tube. The wax paper keeps the chalk from sticking to the tube.
- In a disposable container, mix 2-4 tablespoons of tempera paint with ½ cup water. Use more paint for bright colors and less paint for pastel colors! Stir in 1 cup Plaster of Paris. The mixture should be about the same consistency as frosting.
- Spoon the mixture into the wax paper-lined tube. Make sure to tap the sides of the tube to release any air bubbles in the chalk! Repeat until all tubes have been filled.
- Allow the chalk to dry at room temperature for at least 24 hours. Once the chalk is completely dry, peel off the cardboard tube and wax paper, and you are now ready to create a sidewalk chalk masterpiece!