I’m trying to track down physical creature cards, a logic puzzle that started w/ the Elementary Science Study project (in Newton!) & was riffed on for decades. The visual and mathematical puzzles became quite involved; including combinations of shading, geometry, topology, number theory, and more. Creatures were also creatively named: Mokes, Snorpes, Gligs, Wibbles, Shlooms, Bleeps, Quarks, Trugs, Zyzzes, Mellinarks…
If you run across these somewhere, please reach out and get in touch. I would like to reprint some of the professionally done sequences, and perhaps expand on the idea.
Example (via Amber Case).
Discussion:
https://twitter.com/metasj/status/1584695567846109184