Melted Crayon, oh my! Everyone loves this, adults included. You have to find an electric warming tray at a thrift store, or maybe you have one in your pantry. I did! Lots of grandmas and grampas have them and don't use them, so ask anyone over the age of 60 if they want to get rid of theirs.
Draw with old crayons on paper that has warmed on the tray. The crayon will melt and smoothly move across the paper, soaking in to the paper, and creating crayon art you will love!!! There's something about the fragrance of melting crayon that is soothing, too.
Kids can wear a mitten or hold pot holders, but really the only hand they need to protect is the non-drawing hand. And by the way, these trays are very low heat and kids work with them very well. I'm personally pretty careful about the electric cords, taping them down to the table to prevent tripping or movement of the trays. With young kids, I recommend just one tray one kid at a time. Older kids, I put six or eight at a table at the same time.
Preschoolers love this. Middle school kids love this! I love this.