[lostmsu]

> card mini-game that teaches binary operations

https://esolangs.org/wiki/Lambda:_the_Gathering

[lokopodium]

That had nothing to do with binary, wasn't a mini-game and was generally "out there" in terms of complexity. Definitely a good tool to scare children away from programming.

[lostmsu]

I guess that depends on age.

I just linked it, because it's also a low-level computer science in a different sense.