A software developer and Linux nerd, living in Germany. I’m usually a chill dude but my online persona doesn’t always reflect my true personality. Take what I say with a grain of salt, I usually try to be nice and give good advice, though.
I’m into Free Software, selfhosting, microcontrollers and electronics, freedom, privacy and the usual stuff. And a few select other random things as well.
We’ve had the discussion a while back here in selfhosted. You can find it here: https://awful.systems/post/5029223
Main points: Continued drama around people, and tuwunel is tied to a single, (paid) developer and I figure once there’s anything wrong with that, tuwunel might die instantly. While continuwuity is a community effort and maybe that’s a bit more sustainable. Though I don’t own any crystal ball and I don’t know how things will turn out.
If you want a conduwuit sucessor, I’d choose the continuwuity project over tuwunel. The legitimacy as the sucessor is mainly self-proclaimed, and continuwuity is a community effort. The entire thing is kind of a shitshow, though. If you want to do it like 99% of people, make friends with Synapse.
I think what you describe still holds true. You need a few correct DNS entries and an open port. Once you want VoIP, some more ports and a TURN server will be necessary. And that one took me some effort, but the server itself (including federation) was well within my comfort zone. And I run continuwuity these days because Synapse wastes way too much resources for what I do and their other efforts went nowhere. But I’m not sure about the future of those smaller Matrix server projects.
And if you don’t like Matrix or can’t get it to run, maybe try something like XMPP.
I think educational activities work best once they have some application to someones life. So it’d be something within the realm of a 7yo. And it’s not fun unless there’s a sense of achievement every now and then, along with all the stuff to learn. So probably not too steep of a learning curve.
Sadly they discontinued Lego Mindstorms. I think robotics is a great hands-on topic. People can grasp what they’re currently doing, why they do it, and what it’s good for. It has a tactile aspect, so you’ll train dexterity as well and gently connect the physical realm with the maths.
But other than that, I bet there’s a lot of things you can try. Design a website (and deploy a small webserver). Maybe some easy to use photo gallery if they have a tablet or camera. Maybe a Wordpress for them to write a Blog? They should be familiar with the concept of a diary. Kids love Minecraft, so maybe a Luanti server if you’re into Free Software. But learn how to add NPCs and animals, that is (or used to be?) a complicated process in Luanti and the world feels boring and empty without. A chat server to their loved ones could motivate them to read and write text (messages). Or skip the selfhosting aspect and do the kids games available for Linux. Paint, LibreOffice…
I like the recommendations from other people as well. Sadly I don’t know which kids programming language works best. I think I heard you can just go straight for Python as well. Not sure if that’s true or what age group that applies to. It’s a bit more involved to learn the syntax and why you need brackets around certain things etc but at least they get to learn the real deal and something properly useful. 7 might be a bit young, though. And there might be a language barrier. But that applies to all the computer stuff behind the scenes, unless you’re a native English speaker.