A couple weeks ago, James got a set of large building toys at a garage sale for $5. When I looked on the internet, I found they are called Omagles and they were quite expensive new ($150 or $250, depending on which set you got.) They don't appear to be available anymore. Here are some of the things he's built.
Picasa slideshow. If you can't view it, click on it and it will take you to the web album (I hope).