Build Your Own 3-D Printer!

Like these guys did.

3-D printers are used to do everything from create product prototypes to print entire houses (using gigantic robotic cement pourers). To build your own 3-D printer, you will need (at least):

a) to know how to program
b) a robot
c) a hot air gun
d) lots of space
e) lots of time

So... let me know how it works out for you.