Gotta love Pinterest! It's where I've been getting all my best ideas nowadays. Including this little recipe for Sidewalk Paint.
Super easy to mix up: one cup of cornstarch and one cup of water. Then
just add food coloring! I made it in six colors and put it in six-part
muffin tins so each of the kiddos would have an individual paint set. I
armed them each with foam brushes and set them out to Van Gogh our
driveway.
Little Maggie was perfectly happy with a set of sidewalk chalk and a few crackers.