I would love if you or someone like you compiled a list of the most interesting or fun questions/observations they come up with over time.

I am strongly encouraging you to start running one or many LN nodes with LNbits app. I wrote a simple guide about it here https://darthcoin.substack.com/p/umbrel-node-lnbits Here you have also 3 posts that I recommend to take in consideration for teaching new BTC users: https://darthcoin.substack.com/p/21-reasons-why-bitcoin-will-save https://darthcoin.substack.com/p/bitcoin-be-your-own-bank-think-like https://darthcoin.substack.com/p/umbrel-bitcoin-ln-node

Here's another good resource for Bitcoin, Comprehensive Academic research library https://cdecker.github.io/btcresearch/

How are you warming them up, which topics did you teach them first?

you are a G. dont let anyone tell you otherwise

Is this a part of an overall education regarding Finance? What about Austrian economics vs Keynesian economics?