They'll get there. My daughter somewhat gets it, but doesn't really have a concept of valuation. She thinks everything costs $100, LOL. Like Disneyland trips en sech. She knows that our business takes precedence tho, or we can't do DL, etc. My wife has to go to the office everyday, and often on weekends of late cuz we've been so buried, so she's gotten that talk multiple times, as to why Mom has to work on Saturdays.
My son has ZERO concept of money or value. Everything is eleventy bazillion dollars to him.