A beautiful mess turns large cardboard boxes into playhouses for the kids. The big difference is the wrapping paper and paint she uses to decorate the homes. She even adds shingles for the roofs.
Good for ages 10 and up.
Get the instructions here:
http://www.abeautifulmess.com/2013/01/diy-playhouses.html
Kids activity blog uses pieces of cardboard and ties them together.
Get the instructions here:
http://kidsactivitiesblog.com/64384/cardboard-playhouse
Tiny rotten peanuts makes mini cardboard houses painted in the primary colors.
Get the instructions here:
http://tinyrottenpeanuts.com/mini-houses-recycled-cardboard-art-project-for-kids/