Sidewalk Chalk

Directions

1. 1
   To make white chalk:
2. 2
   Mix together plaster of Paris and water until the mix is about as thick as toothpaste or mashed potatoes. (If it seems too runny, add 1 tablespoon of plaster at a time until it's thick enough.
3. 3
   If it seems too thick, add a small amount of water.)
4. 4
   Set the cardboard tube upright on the waxed paper.
5. 5
   Spoon the mix into the tube.
6. 6
   Try to pop or push out any bubbles.
7. 7
   Let the filled tube rest upright on the waxed paper for 3 to 4 hours until the chalk has set.
8. 8
   Then, peel off the cardboard (it will be damp).
9. 9
   Let the chalk dry completely for 24 hours.