Wikipedia describes Spirograph as a “geometric drawing device that produces mathematical roulette curves of the variety technically known as hypotrochoids and epitrochoids.” While that all sounds very ...

Some of our more senior experienced readers may remember a toy called the Spirograph. In case you don’t, it’s a geometric shape drawing toy. The way it works is a plastic disc with gear teeth around ...

Programmer and musician Nathan Friend’s digital spirograph is oddly addictive. The spirograph, a familiar childhood toy, lets you make pretty, vaguely trippy designs even if you have zero artistic ...