Spirograph aka My Super Fun Hypotrochoid and Epitrochoid Maker!
Yesterday I pulled out my 1967 almost mint condition Spirograph and sat down to play. I bought this little gem on eBay a few years ago because it was one of my most favorite things to do when I was growing up. I was looking forward to revisiting this old friend since I was certain that as an adult I would be able to eliminate some of the things that frustrated me about it as a child. As I prepared my work surface I remembered how my uncoordinated child fingers always had trouble coaxing the little map pins out of their container. I discovered that my arthritic adult fingers have the same problem. As I pinned my ring in place on the official Spirograph corrugated cardboard work surface, I had trouble identifying the holes in the ring that were meant for the pins. There are 4 of them and they're smaller than the other holes, which I still don't know the purpose of. Later I was reminded that it doesn't really matter which holes you stick the map pins into. They will eventually...