Very fun! Also related:<p><a href="https://news.ycombinator.com/item?id=21799988" rel="nofollow">https://news.ycombinator.com/item?id=21799988</a><p>... which includes SQL and some other interesting types.
I have fanaticized for years that school could be more like this.<p>I have even started trying to do something similar to teach Ruby with a Mafia inspired story.