Fab@Home ist a pretty cool project born up in Cornell (disclaimer: in the lab I am working in). If you have never heard of 3D printing, better go to Wikipedia and do so before reading on. Fab@Home is a 3D printer which you can build for your own pleasures at home. As opposed to the very steep price tag on commercial printers (five to six digits, without any decimal point in between) this one will "only" set you back a mere $,1500. You download the instructions for free from the website, order all the parts and assemble it yourself. Thanks to Model 2 this should be fairly easy and involves hardly any wiring. And once you have it put together you can use it to print bricks, cheese sculptures, boring plastic parts, fully function telegraphs and also chocolate.