I'm all into this website this morning. Plans and instructions for lots of intriguing cardboard models, including these Christmas houses. And links to interesting history.
From the site: "Howard Lamey, in Jacksonville, Florida, has retired from a full-time job in advertising that included designing window displays for a major retailer. Now he has turned those artistic talents to designing and building vintage-style cardboard buildings for his family and friends. Howard graciously agreed to share some of his craft knowledge with readers."