Interesting Legos

This is a site I found when I was browsing for Logic gates... an unlikely page to come upon on the first page of a google search, but find it I did. This is a page created by a person who works with maths and physics. He has created CAD models of many interesting things, logic gates for one, using LDraw and MLCAD. I was surprised to see that the models are working ones. Infact, the person mentions that some educators asked if they could use the models for teaching. I saw a video of a rubik's cube. Ofcourse it seems its difficult to turn it around and not knock off the legos but it was impressive. Check it out.