We make scribble cookie crayons all time with our broken crayon pieces. I usually put them in the oven to melt inside a small muffin tin that I have just for that purpose. The kids favorite part of this experience is watching them melt. So I thought, why not let them watch it up close. We peeled and broke the crayons into little pieces and put them into a old, heart shaped candy making tray. Then I heated up the skillet and placed the tray on top of it. The whole melting process took about 5 minutes. It was really exciting for the kids to watch the colors blend and discover what new colors they had created by mixing the different colors. I took them off the tray and let them harden. They just popped right out once they are done. Now they have some fun, heart-shaped crayons to create with.