Ed,
You asked that about the time the weather in California gets real good and my son's baseball starts, so sorry for the long delay.
The barn was made from foam core and coffee stir sticks , I am just getting back to the layout now that it is that season for me, so I will dig around and see if I can find the template I used. That was a Diorama, my daughter and I did for her school project, gave me a good excuse to buy an o gauge corn field.
I cut out a front sheet to match the template in Foam Core, then glued coffee stir sticks on for the trim and the raised slats. Built the doors out of coffee stir sticks, crimped the roof with my fiskars paper crimper and painted it.
-Ted