Now we can produce them for cheap... http://www.thisiscolossal.com/2011/06/markus-kayser-builds-a-solar-powered-3d-printer-that-prints-glass-from-sand-and-a-su

Now we can produce them for cheap... http://www.thisiscolossal.com/2011/06/markus-kayser-builds-a-solar-powered-3d-printer-that-prints-glass-from-sand-and-a-sun-powered-laser-cutter/ http://www.thisiscolossal.com/2011/06/markus-kayser-builds-a...