I think the big difference between this and the pen plotters I used for many years is that the latter can lift the pen. Even so, I could not take my eyes off t

I think the big difference between this and the pen plotters I used for many years is that the latter can lift the pen. Even so, I could not take my eyes off the video of this little toy thing scribbling away so diligently. What a clever thing this is. PS. the old calcomp I used back in the early 80s was quite fun to watch. For one thing, the motors were so strong that they shook the table upon which the plotter sat. For another, graphical terminals were quite rare then, so often you didn't know what the plot would be like until it started to be drawn.