https://makezine.com/projects/make-a-magic-blocks-gadget-cache/
Make a Magic Blocks Gadget Cache - Make:
Sep 11, 2025 - The Magic Blocks gadget cache is a fun and simple “proximity and order” puzzle you can build to add a playful challenge to your geocache.
magic blocksgadget cachemake
https://makezine.com/article/home/fun-games/gadget-cache-road-trip/
Gadget Cache Road Trip! - Make:
Sep 3, 2025 - Road tripping to solve the clever gadget cache contraptions of Trycacheus, in the “Disneyland of geocaching.”
gadget cacheroad tripmake