My parents are very open about their finances, since I started asking about stuff. I still don't know the numbers, but that's because they don't.
I kind of embraced the frugal lifestyle. My parents spend their money on things I don't care about like horses (5 of them, who needs 5 horses?), but are frugal on everything else.
They also wasted a lot of money on capital life insurance (don't know if that's a thing in America) and alike. So all my investment knowledge comes from reading.