Peel the label off the crayons and break into sections about 1/2 inch long.
Remove the metal top from the glass balls and place 4-5 crayon pieces inside. Reattach the metal top to the ornament.
Using a hairdryer, add heat to the ornament and rotate it to let the colors run together. Continue this process until the crayons are completely melted and no clear parts show. I recommend using a glove or something to protect your hands from the heat!