Relatedly, pointed me towards the very interesting "content examples" included with the Unreal Engine: docs.unrealengine.com/4.27/en-US/Res. Museum-like levels demonstrate various techniques with explanation. No scaffolded activities, but easy to imagine that in this context…
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Not a board game manual next to the board game, but explanation *inside* the board game. Not a YouTube tutorial open next to Logic, but an explanatory medium *inside* Logic.
New "letter from the lab" on mass mediums which integrate doing with explanation: andymatuschak.org/doing-centric/