The Mowi Printer is a foldable 3d printer, It can print big prints with two materials. Folded flat it is small and easy to take along. Put your files on a sd card and you do not even need a laptop to print.

You can make this printer yourself. The frame is made from lasercut Birch Plywood. All other non standard parts are 3d printed.
All information can be found on http://reprap.org/wiki/Mowi_printer.
Up-to-date files to start making can be found on https://github.com/Mowi/MowiPrinter Video is at http://youtu.be/pdC9KxD-kWQ