If we told you somebody built a 3D printed go-kart, you’d expect to see a certain sequence of events. A bit of work in CAD, a printer montage, then some assembly. That’s not the case here. [3D ...

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3D printing has had loads of media attention, with advances in the technology producing ambitious - even lethal - things. But 3D pens have a way to go. And the first may yet come from Europe.

As mentioned above, the pen works with either ABS- or PLA-type plastics -- both common choices for most commercial 3D printers. When you buy a 3Doodler, you'll have to specify which you want.

London-based Lix Pen has developed a 3D printing pen that's claimed the smallest in the world. The Lix pen is 0.55 in (14 mm) in diameter and 6.45 in (164 mm) long.