[SixSigma]

Blimey, what a complex set of things to learn nowadays - writing apps and javascript !

When I was a lad I started with the most powerful computer I could afford - a pencil and paper.

Show him this

https://www.cs.drexel.edu/~bls96/museum/cardiac.html

See if it interesting.

Then I moved on to the next most powerful computer I could afford - a ZX81 with 1k of RAM connected to a television set!

I would type programs in from books and magazines and see if I could get them to work - so I learned to fix programs before I learned to write them.

So I still advocate this route. Not writing apps for iPhones or trying to write Xbox games and build websites.

Buy the simplest thing I can find - something like an Arduino that does things on a small scale. Learn how computers work, not how to program them.