With the introduction in recent years of the LEGO Mystery Minifigures series, the number of minifigs in our house has exploded. If you aren't familiar with the concept, LEGO releases a series of unusual minifigures, like Bunny Suit Guy, Yeti, Welder, Diner Waitress, or Bagpiper. Bags in each series are available for only a short period (they are about to retire series 11), and the trick is that each bag is a mystery; that is, you won't know what you're getting until you open the bag. The little guys are highly collectible and super fun to play with. But what do you do with all those guys, and the other minifigures you have from LEGO sets?