Corn starch has to be one of the most versatile craft products I have ever come across. After making yarn hearts with corn starch glue, I did a little search and found out you can also make side walk chalk paint! Best of all it is so easy!
Mix 1/4 cup corn starch to 1/4 cup of water. Stir until well mixed. It it is a little tough at first so hang in there; I found a fork worked best for mixing. Add food coloring.
The "paint" will go on the sidewalk a bit watery but will soon dry into a chalky picture. The kids had fun with this for hours today! I did double the recipe because we had extra friends today, so if you have several children you may want to do the same. You might also want to double it just to store some for later use.