They dont even know where to start to dig in. Just silence mostly. I was once like that also. I understood over many years and diff touch points so I'm slowly working on orange filling this poor guy.
Discussion
Just ask him what money is to him. "What is money?" Is the first domino. I used to not know either. It wasn't until I figured out that the money we use today isn't "real" that it clicked.
Could be the right approach. Recently I heard someone say 'you dont want money you want the things it can buy you' and then if you add in inflation it means that you get less goods and services over time ie less of the things you want.