Materials:
*Old crayons
*Aluminum cans
*Inexpensive ice cube trays or shape molds
*Baking sheet
Directions:
*Preheat the oven to 275 degrees.
*Separate old crayons into groups of similar colors. Peel the paper off of the crayons, then place them in aluminum cans, using one can per color group.
*Place cans on a baking sheet and heat for 10-15 minutes, or until thoroughly melted. The more crayons in a can, the longer it will take for the colors to melt.
*The crayons in a can will tend to melt together into one color. If you would like to keep some color differentiation, place only a few crayons in each can and keep an eye them, pulling each can out of the oven as soon as the crayons inside have completely melted. If you would like a more uniform color, however, leave the crayons in the oven a little longer.
*Pour melted crayons into the shape molds. You can get a multicolored crayon by pouring multiple colors into one mold. The colors will swirl together a little, though, so pick colors that mix well together.
*Let cool for half an hour or so, then pop them out of the molds and they're ready to use.
Note: Crayon does not come off easily, so any molds you end up using will probably end up relegated permanently to crayon making. For most of my molds, I used shaped ice cube trays that I got from Dollar Tree for a dollar. Those seemed to work just fine for making crayons.