This is a project from shortly after Christmas. One store decided to use this box from a fancy set of chairs to ship us an order. The best part is that it's very thick and much sturdier than regular cardboard boxes, and perfect for making into houses. So this:
To make the top "roof" for the house I took the four top flaps and cut triangles out of the edges of each one and then taped the cut edges together to form the sides of the roof. I cut a door out of one side and a hole in the other the size of another large box. the scrap from the box side was cut to the size of the hole on the top of the roof to finish it off. Another box was taped to the side to make it bigger. Windows were cut and everything was fastened together with duct tape.
Ducks liked it OK but didn't like that she has to duck or crawl to get in. She is still a little young yet to fully understand play houses, but had fun playing peekaboo in the windows.
At the very least, it took a month or two after Christmas to get all the cardboard into our recycling bin, so this is a good way to keep it lying arounf the house without your living room look like a cardboard storage warehouse.