Raising one's child properly, spiritually is a very special task the avoidance or neglect of which is a terrible sin. There is a Supreme, All-Powerful Being, the universe didn't create itself, there are beings unseen, the afterlife, virtues, dos and donts, we all have an avowed enemy (Satan), etc. our kids should know these and many more

Tazmode: There is a Supreme, All-Powerful Being

What does this have to do with religion? This is the position of a deist. Religion takes this a few steps further. Christianity, for example, claims that this supreme entity spoke to a human being in the bronze age and told that person to write down a message for me. That is the hurdle you're faced with, not just supreme being blahblahblah.