Here’s a spirograph set I had ordered on Amazon. It should land on my porch by tomorrow night.
It sports 12 outrageously shaped, geared wheels: barrel, trapezoid, pentagon, heart, egg, square, hexagon, star, teardrop, ellipse, shield and star.
The biggest reason for getting it though, I think, is the perfectly round ring (168 teeth outside/ 120 inside), that I expect to be able to use with the 18 round wheels that I already have.
For more than 50 years, Spirograph enthusiasts had two rings to work with: the 150/105 and the 144/ 96. Now there is a third one.