Kid wants to be Christian?

We are atheist & have raised our kids as such. We also have very Christian family members. Our 6 year old has recently shown interest, and asked to pray at dinner tonight because he says he believes in God. When we were asking why & trying to understand where he was coming from, he basically said the idea of an all powerful being that created the world sounds cool. We told him he should learn about the religion, and understand what Christians stand for and the “rules” they hold themselves to before committing to the religion. I want him to learn the perspective from both sides, so I’m posting in both atheist & christian subs, asking for resources/things to mention or talk about/etc. to help him learn so he can make the best decision for himself on what he chooses to follow. Thanks in advance!