However, if he/she comes to me with questions about religion or atheism, I will answer as impartially as I can with as much information for both sides as I can. I will be open and forthcoming and whenever they ask, "Daddy, what do you think I should believe", I will happily answer with: "You have all the information, you make sense of it yourself, whatever you choose is up to you".
So not the complete opposite of what most religious people would do, which is to fight the atheism regardless of how it came about. But I feel that it is the most fair position to only aggressively counter-convert, if somehow, religion was aggressively pushed on them.
Side note, I will be doing everything that I can to make sure that there is nobody in their life that will force religion on their tiny minds. So that I will only ever have to be in the position to offer information and empower them with the wisdom to decide for themselves.