Like lego for houses... or, bricks.
I like machines. I have a design somewhere around here that I kind of wacked together. I should find that and put it here, and try to explain exactly what CEB's are and the machinery involved. I have a lot of info on it already.
This is truely a Feynman Technique project right here.
I actually have a site that I wanted to put CEB stuff on. It's at www.earthblock.org