On October 2017, while visiting Toronto. I finally had the chance of testing a 3doodler 3d pen. Armed with 200 strands of Polar White ABS plastic, I set out to freehand draw a 3d pen sketch of a skull.
Even after a couple of years of not using any 3d pens (or sculpting, really), this sculpture took me 6 hours, 50 strands of plastic and one 3doodler pen. My hands are still good at these sorts of things!