Love this idea. In fact, I loved it when we did our then 3-year-old's room. Now she's more of a PB Teen kind of girl, but the overhead is an amazing trick, to be sure! And instead of plain fine-tip markers, we used paint pens. I don't know if that makes any difference or not, but they sure lasted well, and the color was outstanding. I thought it would be awful to paint over, but when the time came, a couple of coats of KILZ did the job just great.