Students at MIT have creating a 3D printer that all of us should love. It can print using soft serve ice cream. To build the printer, they took a Solidoodle 3D printer and modified. they then put it into a small freezer, and added a cryogen line to disperse liquid nitrogen. When all was said and done, the printer actually worked quite well. Read more about this and check out some photos and videos at http://3dprint.com/9148/3d-printed-ice-cream/