Arh, you can build just about anything out of LEGO nowadays.
This time, it’s the turn of logic gates (damn we should have done that at uni. for our Electronic modules…).
So urm… if you are interested in LEGO and, or a geek, you might want to check out this article out:
And if that still doesn’t satisfy your apatite, here’s a full blown calculating machine (again, built entirely out of LEGO!):
Oh, yeah, almost forgot, here’s the link to that website: