rapid-prototyping machine can print just about any object in three dimensions using a wide variety of materials, from chocolate to silicone. Kits sell for around $2,500. Learn more at fabathome.org
, and check out our interview
with the company's founder.
CNC (computer numerical control) machines take instructions from a computer and cut pieces from a larger block. Commercial models can cost thousands of dollars, but you can find plans for making your own at engadget.com.
Not ready to invest in your own equipment? Head to emachineshop.com, where you can pick a material, draw a part, and have it delivered to your door.