When a British engineer named Denys Fisher introduced the first Spirograph set at a toy fair in 1965, he tapped into a demographic of non-artists who really wanted to create art. Those sprocketed ...

What is spirograph: A geometric drawing device that creates intricate patterns using gears, developed by Denys Fisher in 1965 and now a Hasbro trademark. Why it matters: Spirographs teach geometry, ...

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 ...