I also think the main takeaway they should have out of it is that there’s many ways of doing the same thing and none is “the correct and only way”. They should learn to think critically, navigate unfamiliar user interfaces, learn some more general concepts and connect the dots on how things work, and that computers are logical machines, they don’t just do random things because they’re weird. Teach them the value of being able to dig into how it works even if it doesn’t necessarily benefit them immediately.

This will come gradually. First, show him one way of doing things, let it sink in, let him get comfortable with it, then say “you know, you could do that in another way as well 😉”. I bet he’ll start asking you if there are other ways as well in no time 😂.