1 large thin box
I started by opening both the top and bottom of the box. With the Xacto-knife I cut a slip down one of the wider sides of the box. On the other side about 2 inches from the top I cut a wide rectangle out.
I taped open the back flaps, so that they came out from the front at a 90 degree angle. I covered the entire thing in white paper.
I handed out the paint shirts and put the paint out for the kids and turned them loose knowing I would again be keeping Lysol in business with my next trip to Costco!