My son loves crayons. He loves breaking them, eating them, peeling them, and stabbing things with them. He really doesn't care much about coloring with them, but he can certainly destroy them. So I have ended up with an entire box of broken crayon bits. I had been planning on melting the bits and making "new" crayons for a while but today we finally did it. So, here's the steps:
Liberally coat pan with cooking spray, unless using a flexible silicon pan. It will help them come out easier.
Fill each cup in pan about 3/4 full with broken bits of crayon, paper removed. Put those kids to work sorting the crayon bits! I told you I had a lot! It helps to use a variety of colors in each cup so that you come out with rainbow crayons. Heat oven to 225 degrees and about 15 minutes or until soft and partially melted. Turn oven off and remove crayons. They will continue to soften and cook on the counter. I have made the mistake of over-cooking before and this will make the crayon solids separate from the oil, pretty much ruining your "easy" project.
Let crayons sit and cool for at least 30 minutes. Be patient, taking them out too early will also ruin your project. Clearly, I have some "trial and error" behind me here.
Give to kids and watch them have an entire new set to maul. Enjoy!