Preheat the oven to 275 degrees F.
Peel off any paper from the crayons.
Break the crayons into small pieces, using your hands or a sharp knife.
Set your mold on a baking sheet to keep it sturdy moving to and from the oven.
Fill mold cavities with crayon pieces.
Bake for 10 minutes or so, or until the crayons are fully melted.
Remove from the oven, and let cool completely.
Remove crayons from mold.