1.Measure out the 2 tablespoons of cornstarch into a medium sized bowl. You need put the cornstarch in first to prevent lumps.
2.Add 2 tablespoons water and 4-5 drops food coloring and mix until smooth. You can add more food coloring if you want a brighter color. This is also a great activity to teach children about color mixing.
3.Take the paint outside and create your masterpiece!
4.Let your drawing dry before walking on it. It will wash off in the next rainfall, or you can clean it off earlier with a hose. It may be a little lighter in color than traditional sidewalk chalk.