What do you do with a large cardboard box? I didn't throw it in the recycling bin but let my daughter use it for her art work. Just wrap it around the easel giving multi sides to paint. Then when she has painted all over, turn it around! I put the paint in yogurt cups and set them in paint pots so they would not blow away.
My next paint project for her will be to paint clay pots, I might have to join in there!