I would talk to the guys at http://evilmadscientist.com/ to get tips about getting custom made laser cut acrylic so you can make your own gears for Spirograph. =) Abusive comment hidden. (Show it anyway.)
I like the Bulbdial clock better, crafted by Evil Mad Scientist Laboratories ;)http://www.evilmadscientist.com/article.php/bulbdial Abusive comment hidden. (Show it anyway.)
http://www.evilmadscientist.com/article.php/bulbdial
Great site by the way!
//WoBo