A small gear, and a ruler which has a hole where the gear rolls about. Put the point of pencil in a small hole on the gear, and roll it. We have then a beautifully drawn flowery pattern ("spirograph"). The software Spirographer is a thing like that.
File Size1.74 MB
Operating System Mac OS X 10.2 Macintosh
System Requirements<li>Mac OS X 10.2 or higher</li>


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