In the interest of introducing people to niche hobbies, I want to make some headcanons about how the society, once they're older and can go places on their own without guardians, would geocache!
Reynie - Very much enjoys puzzle caches. Loves making them, solving them, sits and stares at a computer screen or a notepad for hours on end sometimes just to decipher coordinates for a particularly challenging cache. He definitely is working on a fizzy with the help of Kate climbing trees for high-up caches.
Sticky - Remembers every cache he's ever been to but still keeps a journal separate of the site listing the caches he has been to and his honest thoughts. Sometimes he thinks he's being mean if he says he wasn't as enthusiastic about a particular cache (he never is), but he keeps tabs of which types of caches he enjoys best. The journal on his caches became so worn and destroyed he's gone through five journals--and he doesn't do a cache a page, he's written in the margins and made the most of those notebooks. He proudly keeps them on a separate shelf in his room.
Constance - Doesn't cache far from home. Her maximum distance of acceptable travel is probably 100 miles, but when a new cache comes out in her area she is absolutely the first to find 98% of the time, and the other 2% is Kate cheating. (Also known as Constance was asleep when the notif ce in.) She places caches with insanely high difficulty levels and keeps tabs on everyone who's smart enough to find them as a possible ally or rival.
Kate - Doesn't look for geocaches often unless she's with someone else--she's more oriented towards getting places than the scenery along the way. She does place caches, though. Everywhere she can. Most of these caches have a 1 difficulty but a 4.5 or 5 terrain, and she severely overestimates how skilled other people are at reaching her caches. She might scale a twenty foot tree no problem, but Reynie or Sticky have to remind her to use the "special equipment needed" button on those hides. Constance hates Kate's caches but stubbornly continues to be the FtF if she can--she has a reputation to uphold, after all!
This is such a a niche hobby. Niche enough I can't share my username for anonymity's sake. But I hope y'all ask questions. Or comment. Or just interact in general. Geocaching is fun.