It's the Frank Lloyd Wright Robie House. Seems like a great family Christmas present.
And while I'm Amazoning... please buy your Christmas and other holiday presents and all presents for yourself and others through the Althouse portal to Amazon (which is always linked right under this blog's name). You can send a little money my way without paying anything more for your things. And by the way, you can save 55% today on "Lion King" and "Cars" Director's editions sets. But I'm fascinated by these Lego sets. Here's Fallingwater. Seems like you could play with your kids and teach them (and yourself) about architecture.