Step 2: Melt!
Turn on your heat tool or hair dryer. If you're using a hair dryer, you'll need to put it on a low blower setting or use a diffuser, otherwise it will spatter the wax everywhere.
Focus the heat on the crayons. They will quickly turn sweaty, then start dripping down the canvas.
You can change the tilt of the canvas to control how fast the drips go.
Once you're satisfied with how it looks, let it cool a few minutes and hang it up!