That finalmessage.io site is pretty cool! Not sure I would trust it with anything sensitive even if they claim it's encrypted locally before being sent to their server. Would love to find an open source alternative of finalmessage.io that I can audit and run on my own servers. That would be dope! Thank you for that link and for your exercises. Those are pretty cool and I may do that with some family members as a sort of treasure hunt to entice them to learn about bitcoin/lightning in a way that will reward them with sats at the end.