I've accumulated a bunch of paper work and projects in Kindergarten. We took those home and also our school supplies at our desks. That means a bunch of used broken crayons.
What to do, what to do....ah! Let's recycle them!
My mom and I went to IKEA and found these ice trays. Perfect for molding melted crayons. We grouped the broken crayons by color (or close enough). We tried melting them under the hot sun, but they only got soft. So, my mom melted them in a container on our stove and poured the melted crayons into the mold.
After a day of waiting, voila! New crayon sticks.