At the beginning of the year we go through so much paint and paper because the kids are just into the motion of it- they swirl globs of paint round and round on their papers until there are no white spaces left and there are holes in them! It ain't about the product, I know. But it seems like a waste of paper when the kids care not about what happens to it after the fact. Has anyone discovered a way to conserve? Maybe painting on some sort of surface that can be washed off and reused?