Everybody eventually reaches the stage of technological redundancy. If you're in your 30s, you probably remember a time when you had to set the timer for the VHS player in your parents' house, because they had no clue how to. You wondered how anybody could ever fail to learn something so basic. And then one day, someone invented a brand new smart phone, and you had no clue how to use it. Technology is aimed at the young, and one day it'll start to pass over your head even if it hasn't already!
Older people can get some revenge, though. Try showing a young child an old-fashioned TV, like the one in this picture, and asking them to turn it on. Even better, show them a cassette player and a hi-fi. Tell them it plays music and watch them try to work it out. It's fun to get your own back! Just keep them sweet. You might want to borrow their iPad later.