Another lesson I saw in Arts and Activities Magazine and adapted to fit a shorter lesson period. Here is a link to the “It Works!” page http://www.artsandactivities.com/Itworks75.html
Students create a quick watercolor wash background. They look at world architecture and create their own building.
Once that is complete, they cut out the building. I encouraged them to have window cut outs or door cut outs so that the watercolor background could be seen through the doors or windows. They glue the cut out building onto the background.