Cool Melted Crayon Art! by Crystal Laverty Cool Melted Crayon Art! Start with poster board. Glue crayons to the top of the paper & let dry Use a blow dryer to melt the crayons. You want to hold the poster up, and blow downward with the blow dryer so that the crayons go down the poster. Once you are finished and the crayon wax is to your liking, add any kind of art you would like. - you can glue the decorations on -or stick it to the wax while it drys.