Yes, floor time and getting into their world is real currency!
Show them tricks, teach them Rubik’s cubes or something. Kids love learning and novelty (not lectures: show, don’t tell!)
Even if it’s just grabbing a broom, holding it up and spinning around and getting dizzy - good, clean fun (until you throw up on them)
It’s coming up in an odd way in the mountain biking community, where they talk about min-maxing.
The idea is minimum budget, maximum effect for that expense (what’s the best I can do with the bike I’ve got, rather than going the ‘full midlife crisis’/orthodontist approach of spending $15-25k on what’s basically the latest handbag bike).