I love sidewalk chalk. To me, sidewalk chalk is a mother's dream-come-true for her artistic children. There is usually more than ample space for the kids to draw, and it washes away easily with a hose or a steady rain.
However, my kids prefer painting over coloring. Something about that brush makes them feel extra creative and excited. So I did a little research online for an inexpensive paint to use outside that would wash away as easily as sidewalk chalk (and that is totally non-toxic) ... and I found the perfect "sidewalk paint".
Mix together equal parts cornstarch and water in a large bowl. Pour into individual cups or bowls and then add food coloring to make different colors. Then paint like crazy on the sidewalk!!
I found that an old styrofoam egg carton was the perfect container for the individual paints. It gave the kids the opportunity to mix them to create even more interesting colors! I just filled only half of the cups and left the remaining empty.
Our paint washed away the next day with a good summer rain. Good thing it's easy to make more!