Gather up all of your broken crayons, and cut them into small pieces.
Preheat the oven to 150 degrees.
Fill the muffin tin or aluminum "throw-a-way" tins from the dollar store with a inch-thick layer of crayon pieces.
Bake 15-20 minutes, or until the wax is melted.
Allow the tin to cool; then pop out the crayons, and they're ready for use.
Candy and soap making molds can also be used to create fun, shaped crayons.