Just as a cube folds out into six squares, a tesseract folds out into eight cubes. Now this makes for an interesting house design, but even more interesting is that, during an earthquake, the house “folds up” in the fourth dimension. Which is hard to picture. This is one view, which gets the connections between the eight cubes right, but ignores the fact that they all have the same size and shape:
Here is another view (on second thoughts, maybe living in a house like that would make me sea-sick):
Apparently you can actually build such a house in Second Life.