For all you non-artists, this might help. Actually, I take that back. This looks extremely hard.
“The Lix pen is both a pen and a 3D printer. It melts and pours colored plastic through the tip, which quickly cools and hardens. It isn’t the only 3D pen on the market, but the Lix is the smallest one available, and the slickest-looking.” Business Insider
Source: Business Insider