If you work with preschoolers, you have them. Those partially unwrapped, broken crayons piled up in a box or ice cream bucket. Well here’s a way to use those nubbins up!
Get an old cheese grater (it’s a pain to clean wax, so use one you can devote to the arts) and let your little ones help you grate up those crayon cast-offs into a colorful assortment of shavings. (While you’re doing this, warm up your iron on a medium setting.) Next, fold a piece of wax paper in half, and have the children arrange the shavings inside the “paper sandwich”. Place the paper sandwich into an art towel sandwich (one on the bottom to protect your surface from wax leaks and heat, and a thin one on top to protect your iron from the same). Depending upon the age and maturity of your children, you may point out that they may hold the handle of the iron with you while you rub it across the towel covered wax paper, or, if that’s too risky, just put them in charge of counting. (Your total counting time will depend on the thickness of your top towel, but start with say 10-15 seconds.) Check to see if the wax has been satisfactorily melted. Add more time if needed.