Welding training kits comprising pre-cut sheet metal panels with interdigitating finger joint geometry for use in learning tungsten inert gas welding; welding hobby kits comprising pre-cut sheet metal panels for assembly and welding into threedimensional decorative sculptures; educational welding kits comprising pre-cut sheet metal panels configured for self-fixturing assembly without external clamps or fixtures; craft kits comprising pre-cut laser-cut sheet metal components for assembly into...