Sidewalk chalk should always be supervised play

So, tonight after supper the girls asked if they could go outside and play while I cleaned up the kitchen. They have just gotten to the point where they will play outside without me or Jamie right by their side. So most nights after supper that's where they go. While they are out, they come in and out to give updates of what they're playing or tattle on each other.

Tonight they asked if they could play with their new sidewalk chalk that they got for Easter. They love sidewalk chalk and since we don't have a paved driveway, they draw on the garage floor. Kinsley has been practicing writing her numbers, letters, people's names, etc. Sidewalk chalk is great! Right? Well, maybe I should have asked where they planned to draw.....