3D printers are all the rage today.  One of the more recent products is the 3Doodler.  The 3Doodler allows anyone to essentially print what they want straight from their hand.  There is no need for creating a CAD model of the part you want printed, you can simply create it from your imagination.  It is easy to use, fun, and you have a tangible product to show when you are done.  It is a tool for quick prototyping and a cool gadget designed particularly well.