Yet another 50-something-year-old here who grew up in Silicon Valley.
I first learned to program in BASIC around 1974 when I was about 10 years old.
My mom enrolled me in a class at the People's Computer Company storefront community center in Menlo Park, CA. Does anyone else here remember that place? I googled around but couldn't find any pictures of what it looked like inside the center. PCC is better known for publishing the computer magazine Dr. Dobbs Journal.
Anyway, they had 2 PDP minicomputers (donated old PDP-8 systems, I think), a couple of Teletypes, and an optical paper tape reader. It was all low-key and low budget. At some point one of the machines developed a flaky memory that caused it to periodically crash. When I was around, it became my job to reboot it and reload the runtime system from fan-folded paper tape through the optical reader. Later on, the optical reader died and for a time I had to resort to loading the paper tape using the slow mechanical reader on one of the Teletypes.
Even before then, my dad (who worked for IBM) had a teletype installed in a spare bedroom at home for awhile where he could work by using an acoustical modem in a wooden box where you would place the telephone receiver after dialing the access phone number.
It was similar and possibly identical to this:
1964 Antique MODEM Live Demo - YouTube
Occasionally I would go into work with him on the weekend and he would write programs in pencil on a standardized sheet of grid paper. After he had a few pages ready he would hand them to me and I would walk down the hall to the punchcard room and create punchcards on something that looked like a cross between an IBM electric typewriter and a paper money counting machine at a casino. It was very likely an IBM 129 Card Data Recorder like this:
Silicon Valley was an odd place to be a kid. I once found several blank 3-4" silicon wafers (used for making computer chips) sitting in the street gutter outside my home. Another time I found a Signetics semiconductor chip catalog book sitting on the lawn of the playground at my elementary school.
Later, my junior high school got a couple of Imsai 8080 boxes and I taught myself simple machine language programming. When I wasn't in school I would sometimes stop by the Computer Plus store in Sunnyvale which carried some of the earliest personal computers. I either didn't know or had forgotten until I just googled it now but the store was run by Steve Wozniak's brother, Mark.
Around that time I also got my first computer, a TRS-80 -- my dad was too cheap to buy me an Apple II and I was too lazy to get a paper route to get my own.