I was thinking about something similar recently: I was raised in a very christian household, and while I've lost faith in divinity, I still look back fondly at being raised that way and believe it did instill valuable life lessons that just don't require the existence of a god to be valuable. Having said all that, I've been finding myself a bit uncomfortable with religious books and stories and such which our families share with our own young children. The kids seem so impressionable and religious stuff seems like such overt brainwashing from my non-believing adult perspective. But these two instincts are in conflict! My children will inevitably be less influenced by this than I was (we aren't going to church and Sunday school every week...), and those years of constant exposure didn't keep me from developing my own views and opinions when I grew up. So my conclusion is that maybe I don't need to worry so much about my kids being impressionable now because they aren't going to get stuck, they're going to keep taking in and incorporating different influences for decades, maybe what I need to do instead is work hard at answering their questions in a way that keeps them curious and gives them room to grow.