It just ocurred to me that when you were talking about the crayons, this could be the beginning of a batik. Has anyone ever tried to do batik with crayons? With traditional batiks, you paint with wax on a light colored fabric, then dye the whole thing, paint (draw) some more wax on then dye with the next darker color of dye. It seems like the crayon wax would act as a "resist" and at least partially block the dye.
Thanks for the tutorial, it is definitely going to get book marked!