My wife happens to own one of the earliest Spirograph toys. The image at left is from the inside of the box. Can you figure out what numbers I've covered up with red circles? Also, what do these numbers actually refer to? (Yes, the NUMBER OF THE WHEEL, but what does it physically count?)
BONUS: Guess the copyright year on this Spirograph! Closest will earn a special mention when I post the solution this evening.
Hint
This is the time of year when you might see some of these 299 items around town… if you were in Michigan. You probably won't see their kind in California (at least, not in the Bay Area).
Here's the full list. Which ones are your favorites?
Congratulations to yesterday's solvers Aditi, Anna J. (and Dad), Audrey, Carleton, Inca, Jacob C., Peter V., Zachary S., and Mrs. Gregg. Thanks to everybody who made a guess!
In addition, you can browse the archive of past online puzzles.