There have been many homemade and DIY 3D printers, but I think the 3D printer constructed by Italian maker Michele Lizzit is the first one I've seen that has cardboard biscuit boxes supporting the entire structure. Of course, they don't make up the whole printer: the 18-year-old, who's a student at the Liceo Scientifico Copernico in Udine, scavenged the parts from a flatbed scanner and three inkjet printers to build his own operational 3D printer. It only cost Lizzit €10 to build the closed-loop 3D printer - almost everything was able to be salvaged from scrap. He also created some open source firmware for the printer, which is available on Github. Read more at 3DPrint.com: http://3dprint.com/185735/inexpensiv...de-3d-printer/