http://greatscience.com/explore/exhibits/build-it
Paul Janssen has created a giant version of the beloved Yellow Castle.

If you are near Cleveland from now until Labor Day, it is very worth checking out. I will get better pictures of it and post them.
In this folder you will find several shots of this giant Yellow Castle.
https://www.flickr.com/photos/48243528@N00/albums/72157684527247926
You can't tell but...he built the giant bricks and plates, then built the castle with those. In person, it is really quite awesome.