http://stealthandaces.wordpress.com/2010/10/04/96/
So, chalk it up to finding both a used spirograph and some circular plastic canvas pieces on the same day at my local scrap exchange, but I've been using embroidery floss to make wearable spirograph necklaces:


Me modeling for size demonstration.



Please ignore the salsa stain - I should wear a bib when I eat.
But, I thought I'd share. It's a simple project that you can whip up in a night - just buy some canvas circles, cut out the middle rings, pick your favorite floss colors, and go crazy!