1. A welding simulator for use with heat-sensitive paper, comprising a handpiece having a heat tube retractably mounted thereon, air supply means coupled to said heat tube for providing a stream of hot air through said tube so as to be projected from one end of said tube, heating means for heating the air projected from said heat tube, and drive means mounted on said handpiece for retracting said tube at a predetermined rate to simulate consumption of an electric arc welding rod.