The Mars Foundation and Thingiverse team up with MakerBot’s off-the-shelf open source 3D printer to design and prototype models for use in Martian settlement. A library of open source designs is archived at Thingiverse online for anyone to “print” using a MakerBot.  Everything from screwdrivers to saxophones will come out of a little Martian machine like CupCake.  Practice now, submit your work, and help build a design archive which will be called upon for ages.  : )