Is it possible to extrude along a curved path like those made by a spirograph? I was looking at spirograph drawings and I was wondering if Blender has any way of extruding along such a path so that it could be turned into a mesh object. Here's a link to some spirograph pictures:
https://www.google.com/search?q=spirograph&amp;num=100&amp;safe=off&amp;rlz=1C5CHFA_enUS511US512&amp;espv=210&amp;es_sm=119&amp;source=lnms&amp;tbm=isch&amp;sa=X&amp;ei=_aonU9OiH8PlyAHgxYBw&amp;ved=0CAoQ_AUoAg&amp;biw=1076&amp;bih=603

I assume you would need to know the mathematical formula for the curve?
You can also use an Array modifier to create a basic design: