FARGO - Hidden among the cramped shelves and workbenches of Alvin "Junior" Berg's basement shop is a little sign that says it all. "The only difference between men and boys is the price of their toys.

They are miniature buildings, but Jim and Sue Roach's passion for making them is so big, the couple has had to erect a shed to house their creations. Over the past decade, the Roaches have made eight ...