How do you guys discern what is age appropriate on the topic of money?

I have a six year old step daughter who shares custody with us and her birth mom. Money isn’t so much a problem for us, but her mom is a bit of a spender and thus is always complaining about money for necessities to the kid. It brings up some questions at our house and I wonder what everyone’s opinion of what’s age-appropriate is.We are privileged enough to not have to say to her that we can’t afford certain things, but we might say that something is a silly price when we can get it cheaper elsewhere. She often asks “do we have enough money?” for basic things, and “how much money do we have?”. She seems borderline anxious about it. I always tell her she’s a kid and not to worry about money, but her mom gives her the exact prices of things she’s buying (I think more to guilt her than to educate her, which I disagree with, but her house her rules). I’ve taught her how to read prices on things for her own allowance and such, but I’m more talking about necessities and bills.I understand we are in a huge position of privilege to where she doesn’t have to worry about money and some kids have to worry about things like this. Is that something we should be protecting, or is it better to instill certain thoughts of being financially responsible by talking about the cost of things and how working correlates with earnings?As of right now, like I said, it comes up and we just don’t want her to either think she has to worry about money or that we’re filthy rich. I also don’t want her to feel like we don’t respect her or think she’s smart enough for saying that “it’s grownup stuff don’t worry about it” if her mom is doing the contrary.How has/is everyone else handling money talks? via /r/Parenting https://ift.tt/2BObu5Z