Yesterday I made some art for the house!
I used a die cut to make something called an elastic square out of posterboard. Basically... it folds to look like a top of a box. You can do the same thing by hand by scoring the lines you want to fold.
Then I attached some of that really cheap brown paper towel that you find at schools. This way the crayon would have something to latch onto, instead of slick posterboard. That's right, folks, crayon!
As for the portrait of Van Gogh... as you can tell, I'm no V.G.! For starters, I have both of my ears, yet! I tried the wax thing for him, but melting it distorted the shapes too much, so I moved to tempera paint, applied with a pencil, to get that really nice texturing that you see in Van Gogh's work.