Those sprocketed wheels and rings helped many people discover their inner artist, one ballpoint pen or colored pencil at a time. Spirograph drawings were easy to create, and the results were ...

At first glance the monicker “spirograph” seems wrong, because where are the gears? However, [Yoshihito] has them stashed underneath the sheet of paper, with magnets controlling the pens.

[Darcy] thought it would be neat to combine the Spirograph’s drawing style with ... depending on the speeds of the two motors. Switching pen colors along the way adds to the coolness.

A basic spirograph set includes plastic rings (stators) with gear teeth on the inside and outside. Gearwheels (rotors), also with teeth and holes for pens, are spun around the rings to create ...

Dominating a whole room, it looks far too unwieldy to draw a geometric picture with a small ballpoint pen. But this giant Spirograph graphic images that are both huge and unique each time.