3D Printers

http://en.wikipedia.org/wiki/3D_printing
http://www.ctvnews.ca/sci-tech/3d-printing-what-is-it-and-how-does-it-work-1.1295363
http://gizmodo.com/why-3d-printing-is-overhyped-i-should-know-i-do-it-fo-508176750

Videos
http://www.youtube.com/watch?v=8aghzpO_UZE
http://www.youtube.com/watch?v=G0EJmBoLq-g