Please not javascript or python. You have the right idea starting with C++ but C might be an even better place to start. 13 is old enough to comprehend the fundamentals. I learned programming on my own by starting at the top and working down, and I really regret it. Starting from the bottom and working up would have made me a much stronger programmer much sooner. I was 10 at the time and I wouldn’t have been able to comprehend it all, but by 13 I would have been able, with a good teacher.

If you have a spare iPad the Swift Playgrounds app is free and fun.

Something like a raspberry pi with an activity book might be the thing, games are pretty advanced if you don’t know the basics of data handling and such.

Zachlikes aren’t all about coding, but most of them will get you in the mindset. My favorite of them is Infinifactory but there are ones that are literally about writing code.

For a continued theme of, essentially, visually programming, Factorio and Satisfactory are great automation games and there are lots of smaller names like them.

Duskers is an interesting game. I’ve only played it a little bit, but in it you use a text terminal to navigate a drone through derelict spaceships.

Most of those are not directly about coding, but they’re all adjacent and can help with reaching that headspace.

I can recommend a game called “The Farmer was Replaced”. It’s a game about controlling a drone over a field via python scripts. You can use an in-game editor or you can use a third-party editor. Personally, I quite enjoy the game for playfully interacting with coding.

Nice getup to get the basic mindset of programming for kids from the folks at MIT: https://scratch.mit.edu/

Somewhere around there’s a locally installable version, I’d first found it via the little yunohost boxes.

Edit: others suggested programming games; those are also a great start that satisfies the two big requirements I mention.

If he plays any single player games, i’d probably start there. Modding. Especially if Minecraft or Roblox or Rimworld and the like.

I’ve taught a lot of people low level C and C++ over the years. Two of the most important things for beginners is getting feedback (what I call “blinky lights”) and a reason to persist when learning gets hard. Creating a mod or cheats for a game can be great at fulfilling both of those requirements. You get to see a more tangible result of your work than a CLI print, and you have goals or a vision you’re chasing. This is one reason why webdev is so accessible; the issue there is learning multiple languages and frameworks all at the same time which can be difficult if unguided.

My circles tend to all be low-level systems people, may be different in others; but all of the best programmers I know started with hacking on or making games or things for games. The desire to understand, to know more, to create; that pushed all of them. Getting to see the beating heart —the code describing the game mechanics you’ve used for hours— for the first time, can be a magical experience; so things with open APIs or unity games where the code is relatively accessible, are quite good.

Another interesting place to start could be excel formulas. If he’s into any tabletop rpgs challenge him to make a character sheet using formulas and named cells. This could be a good baby step into the fundamentals of programming learning if functions and how two objects interact in code. Once he has that, add an initiative tracker using VBA.

Just in case don’t force anything, it could be he isn’t interested. That curiosity should be on him, but sometimes you have to throw reeses on the floor to attract the ET.

My son is also into gaming and started with a juvinile course creating roblox games. Say what you want about Roblox (you are right) but it is a fantastic introduction to basic development in a game environment (remember, reeses) Two years later, now at 14, he started a python course and comes every Thursday excited to show me what he learnt.

My daughter on the other hand, will throw up just thinking about it xD

Godot has a series of tutorials focused at kids looking to make their first game. should check that out. Godot is really easy to use.

Or you could go the route that many of us did way back in the day with geocities and set up a neocities account and learn the basics of HTML. they can set up their own little website for whatever their passion is. HTML, IMHO, is a great introduction to coding.

You try to have him hack php websites. That seems to be very easy these days.

Start with some python and side step to Godot?

Depending in the games some use LUA for modding so there is that path too.

Depends on what he likes to play, but PICO-8 can be easy and fun for simple 2D stuff.

It’s been a couple of years since I used it, but I recall making a platformer without too much trouble (tho, I was loosely following a tutorial)

Check out TIC-80, might be a nice first step with a fast return/outcome

Honestly, I hate JavaScript, but I like JavaScript for this. You don’t need a compiler and every computer has an interpreter for it. You could make a baseline thing and let him tinker. It comes with excellent developer tools with breakpoints, stepping, live editing. It’s literally the least you have to do to make working interactive code.

Or another option is there was Robocode — a tank game where you program an autonomous robot to win a battle royale. Or there is Screeps — a StarCraft like game where you write code for different buildings and units and attempt to conquer the land.

I like the idea of code-as-gameplay. You get to play while being pushed to write more sophisticated code in order to do better.