Notes on making factorio-thomas, a mod for Factorio that adds several talking locomotives.
My son starting walking not long ago, and he can say a few words (mostly "this" and "that"), but he really likes Thomas & Friends, and will give an enthusiastic "toot, toot" whenever the little blue engine is seen.
Having just logged 200 hours in Factorio, I immediately got the itch to add these engines to the game, and get them huffing and puffing around my base. I set about reading the docs in the wiki, unpacking a few mods to inspect, and dusting cobwebs off the little bit of Lua that I knew.