I don't have any particular approach right now (my oldest is only 7), but I am trying to be open about finances with them. When we purchase things at the store

I don't have any particular approach right now (my oldest is only 7), but I am trying to be open about finances with them. When we purchase things at the store or online we talk about how we are spending x dollars, or that we pay for the water and electricity we use, I get paid for the work I do for my job, like that. As they get older I will definitely introduce other concepts like personal finance, checking accounts, credit and loans, investing, taxes, saving, and so on. Like any complex problem I don't think there is a simple solution, just lots of conversations over time.