There are millions of people in the world who have never rolled down the window in the car.
This makes me sad.
I can’t recall which novel I was recently reading, in which there was scene of the father, in the mother’s absence, preparing supper, with the kids sitting a the kitchen table. Dad, to pass the time, said “Let’s play a game.” His daughter answered “We can’t – the computer’s upstairs”.
I was at a Cub Scout camp with my son a few years ago, and the kids were all in the rec room, trying to get the troop leader’s laptop to run Hearts, to no avail. I reached into the box of analog games and pulled out a pack of cards, and they looked at me like I was holding a… thing they had never seen before.
The word “No”.
Having to wait for water to boil. When I was a young’un, if I wanted cocoa I had to boil water on the range.
Family dinner- When I was but a wee lad, we always ate dinner together. This was because my sister and I were too young to use the oven. Now, with microwaves many families eat separately.
As I recall, when my dad bought the '64 Impala (used), he had lap belts added to the (bench) seats, front and back.
And no one much younger than me would get this cartoon I once had in a book: all black except for two opposing triangles, captioned “View of the world from someone living in a beer can”.
Someone earlier mentioned how new movies were in theaters for a couple of weeks and maybe could return for a second run. But for the most part, they finished their run and simply went away. You might catch them again a few years later on TV, but in the pre-VHS days you saw them, and then they were gone and inaccessible to you.
It was somewhat similar with hit songs. In the 50s and 60s if you liked a song (but not enough to buy the record), once its run on the charts was done, it would drop into a black hole. And until the concept of an “Oldies” radio station came into play (and this was pretty severely limited until a few decades after the fact), you would rarely hear this song again on the radio; you were out of luck unless you owned the record.
The playing of “recurrents” — that is, songs that were hits a few months ago but had fallen off of the charts — didn’t emerge on Top 40 radio until the mid-70s.
Of course, now the concept of radio itself as a source of music is foreign to most kids, and they can pretty much instantaneously access any song from any era with ease.
People still get phone books. I get one about every three months whether I want one or not. I even put my name on an opt-out list and they still keep coming. I just got another one two weeks ago.
Edit - and I don’t even have a landline!
Putting tin foil on the TV’s “rabbit ears” to improve reception. 
UHF.
Actually turning a knob on the TV in order to change channels.
To me, it belongs in the “Don’t miss this bit” - How do you SAFELY roll down/up the passenger window if you’re the only one in the car while moving? The answer is “YOU DON"T”, since in reality it meant stretching all the way over at a odd angle and turning the window crank while trying to steer and keep control of the vehicle - probably not considered a safe practice.
As for tube testers, I dimly remember my Dad using one back in the early 1970s, was in the front of the Woolworths (of course). By the mid-1970s we had Solid State TVs, so no more tube-testing required…
I wonder what it says about your nostalgia level when you look up things from your past on the internet…
“The Rabbit Test” and cultural references to it, e.g. “Sweet Emotion,” that episode of MASH where they have to perform surgery on Radar’s rabbit to test if Hot Lips is pregnant, that old Billy Crystal movie, etc.
Bicycles for kids over ~8 years old that didn’t have any gears.
I could roll down the back seat window while driving. Not safely, of course, but I could do it.
American-designed cars* that actually looked good.* (Although the Tesla is pretty cool.)
They won’t know what those triangular ventilator windows were in the front either.
And let’s not forget how you had to pull the button out to set up a channel on the radio.
Has anyone mentioned record players? Needles? Skipping?
How about hovering under a desk hoping it will stop an atom bomb from hitting you?
I was gonna mention this, and also ask if any bikes still have coaster brakes as opposed to hand brakes.
Second grade at Coggeshall elementary school!
Pull string talking dolls.
You pulled a string. This compressed a spring. The compressed spring turned a tiny record in front of a plastic cone.
Talking dolls these days work on bubble switches placed in the doll (usually in the hands). These cause a chip to play back a clip.
OTTOMH, the last pull string talking dolls I saw were Ren and Stimpy back in 93 or so.
RadioShack as the one stop shop for all your needs- legal and otherwise
Want to build a radio control car? A complete television? a working telephone (even though you were supposed to get your phone from Bell)? A bomb? Want to steal cable? Want to defeat Macrovision and illegally copy video tapes?
Radio Shack had it all. It was a tower of dreams just waiting to be built.
These days, it’s a failing company that sells cell phones and overpriced toys.
Horizontal and vertical holds on the television. For that matter, color and tint adjustments.
Changing channels without remote.
Using card catalogs at the library (prehistoric googling)
Using print encyclopedias and dictionaries.
Sandlot ballgames, choosing teams, laying down your own bases out of pieces of cardboard, and being your own umpires.
Having to watch your favorite show when it comes on, not on tape or DVR.
Cigarette machines.