
The Inspirograph is an online, browser-based take on the classic Spirograph geometric drawing toy created by engineer Nathan Friend. There are several different size and color options, plus features for downloading and sharing images.
image via Inspirograph
via Boing Boing
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A May 1977 clip from the classic BBC series "Tomorrow's Word" explains how Denys Fisher developed the Spirograph drawing toy.

http://vimeo.com/31933085 "Drawing Apparatus" by artist Robert Howsare is a mesmerizing drawing machine that uses two record turntables to create beautiful Spirograph-style drawings (video). via Wired

Jason Allemann built a LEGO Spirograph that can draw several pleasing circular designs, such a "The Wheel" and "The Hurricane". The arms of the machine can be adjusted to modify the design, and Allemann posted full instructions for the design on his site JK Brickworks so you can try making…

The Cycloid Drawing Machine by Joe Freedman is a device similar to a Spirograph toy made using adjustable and interchangeable wooden gears that can be used to create elaborate and beautiful designs on paper. A video review of the Cycloid by Wayne Schmidt shows a number of configurations in action as different…

The DuoGraph Drawing Machine is a project by Joe Freedman that combines the simplicity of his first PrimoGraf Drawing Machine and the advanced design of his beautifully complicated Cycloid Drawing Machine. The DuoGraph takes some design elements from the Cycloid, but is smaller, simpler, and more portable. Like the PrimoGraf and…

"Spirograph World Map" is a collage of individually colored Spirograph patterns that form a colorful map of the world. British artist Rachel Evans created the work over the course of two months (see a time-lapse here). Prints of the collage are available on Redbubble. http://youtu.be/1RG38bcDVx4 submitted via Laughing Squid Tips