Another pinner says: I saw something like this at Michaels ! All you do is line crayons or colored wax at the top of a canvas. Then you burn the wax so it melts down the canvas leaving trails of color !
Stick a crayon in a hot glue gun, and see what happens. I'm buying every tin of used crayons I see at garage sales this summer for this project. I'm imagining some seriously cool relief paintings now. OUTTA MY WAY.