I thought Blacksmithing was a natural extension from casting. I made a propane powered forge and hammered out a few swords and kitchen knives out of scrap car springs (if anyone wants to have a sword fight come on over, I have extras). For a bit more challenge I made a Damascus steel knife out of a bicycle chain. I also did a few other projects. Making the forge was a good challenge. I also made an anvil out of a piece of rail.