Maybe in your region they're still around, but when I say they're "hard to find," I mean it would probably take me days to locate one. Any attempt to teach kids how to use one would probably require a road trip.Which is really strange, since it's something I expect to have happen the next time I take a taxi to the local mall. If I decide to get the taxi to pick me up somewhere other than at Walmart, I'll need to go to the pay phone, put in two quarters (local pay phones cost 50 cents here), punch in the number, and tell the dispatcher where to pick me up.
Hell, even calling a taxi is becoming outdated technology. All our cab companies have started going out of business ever since Uber came to town. It's easier, faster, and cheaper than a traditional taxi.
I appreciate wanting to have an understanding of older technology, but there comes a point where you're just learning unnecessary information.