Checkout this awesome 3D printing pen! the 3D-doodler
it uses colorful sticks of plastic to create really unique creations.
it was introduced in a kick starter project
to me it looks and sounds like a cross from an electric shaver and or hair clipper / trimmer.
What I like about this tool is you can start doodling on a piece of paper then gradually pull the pen up and the plastic hardens in mid air, producing a one of a kind 3D model.
here a review and some examples of what you can make, the only limit is your imagination... that and possibly your balance.
http://s3-us-west-1.amazonaws.com/static.brit.co/wp-content/uploads/2013/02/3Doodler-MoreSamples.jpg
here is a link to more economical offer.
And for people who don't want a shaver and rather prefer a pen why not try a LIX the successor of the 3Ddoodler, also started on Kick starter.
