I’ve more calculators than I know what to do with
Mostly TI
The youngsters actually marvel. And when you show them the goods and they feel what it's like to press PHYSICAL BUTTONS, it's like going back in time.
The HP 12c's reverse Polish notation takes some time to figure out, but you can't go back once mastered.
But I am handing them down to my son, Freshman at Colorado School of MInes, Class of 2027.
I had a TI-58 programmable calculator in high school and college. It was fun to program, and cheaper and more portable than a PC. It went kaput when I couldn’t replace the rechargeable battery pack.
But now, I have a ‘58 emulator on my phone. If I ever need more than that, I have Excel and matlab/octave.