I found this is super cool site, Studio Shed, when I was doing some fantasy research designing a music studio for Pete. They have this wonderful custom shed builder option that is addictive. I showed the girls, and they loved it too. I didn't even occur to me to try to print out each elevation until recently. The print-outs are perfect for quick model building.
Each girl designed a shed, then we printed out each view, glued the print-outs to cardstock, and then cut them out again. To assemble, we just taped them up. (Printing onto cardstock directly would have been better) Then the stickers and small animals took over. We are studying architecture right now, and this was the perfect project for jumping into some quick designing and model making.