Sidewalk Chalk

shells from 6 eggs
1 tsp very hot tap water
1 tsp flour

Wash the eggshells well, so they don’t have any egg left in them. Dry them and grind them with a rock on
the sidewalk or other concrete surface. Make sure the rock you’re using for grinding is clean so you don’t
get dirt ground in with the eggshells. Grind the eggshells into a fine powder. You’ll need one soup spoonful of this powder to make a stick of chalk. When you have enough powder to make a stick of chalk, sift or pick out any little bits of eggshell that are still not ground up and throw them away. Scoop the powder into a cup or paper towel and bring it into the house for the next part. Stir the flour and hot water together in a small dish to make a paste. Put the soup spoonful of eggshell powder into the paste and mix well. It may help to mash it with the back of the spoon. Add a few drops of food coloring if you want colored chalk. Shape this mixture into a chalk stick. Then roll it up in a strip of paper towel and set aside to dry. (Drying takes about three days.) Then just peel the paper off one end and you’re ready for some creativity!