My dad has always been interested in history. He still says that he wants to be an archeologist when he grows up. He loves museums and historical sites and books about history, both fictional and not. He knows a good deal about a good deal of historical locations and figures and battles and what not.
Several years ago he decided to start a company selling Historical Miniatures (Little Tin Soldiers). At the time I really didn't quite understand it. Was there really a huge market for small collectible metal figures representing historical scenes? Well, apparently there is, and for years now he has been selling these figures as a side job, out of his house.