The Spirograph is a popular geometrical drawing tool for producing technical curves, patterns and shapes. It consists of a set of gears with holes through which you put a pen; the pen is then used to push the gear around inside another gear, on top of a piece of paper. We all know them, and they are great fun, producing creative results for everyone of any ability.
Now there is a browser-based take on the classic Spirograph geometric drawing toy created by engineer Nathan Friend. Easily choose from several different size and color options, plus features for downloading and sharing images easily.