This is a card in Dave's Virtual Box of Cards.
This page is Misc. ideas. See also programming-ideas (which also includes videogame ideas)
Get an old used word processor (the electric typewriters with a tiny bit of smarts) and replace its brain with a microcontroller so it works like a teletype - but run it locally (not connected to some mainframe). See this for the experience I’m going after: https://www.youtube.com/watch?v=_DTpQ4Kk2wA
"From Plop to Clop: A Horse Instruction Manual" - a horse husbandry book from an alternate dimension