I did not come up with this idea. I had seen it a while ago over at Just For Fun, and vowed to try it. So today was the day. It was really fun. My son and I mixed up the "paint." He added lots of color and the sidewalk, driveway(we don't have a sidewalk), drawings turned out beautifully. I wasn't sure at first because they looked thin when we painted them on. But, oh when they dried they were beautiful. My little guy actually said, "This is fun!" Give it a try.