I remember watching a house being made. Ya, it was more like and igloo but still you gotta start somewhere. One of the engineers I work with built his own 3D printer... ummm ya.... Amazing tech that, in my mind has the ability to change the world. Just like you mentioned about the mobile phone. That mini hand held computer in thumbing on right now. Imma watch that video in the morning while I am waiting for my coffee to brew. Thanks for sharing!!