Religion....yes or no
Subject of religion is very controversial topic.
I am an Orthodox Christian, my son and husband are Muslim (he is not so true believer that is why I call him "home-grown" Muslim). Mosques my My husband and my son never visit the mosques BUT my son starts asking the questions such as "Who is God," Why do I have a cross around my neck, and he and his father wears crescent". I can not tell my son about Islam because I don't know almost nothing about this religion. I talk about Christianity, about Christmas, about Easter, etc. I would not be surprised if my son will grow up and will change the religion.
You can not baptize a child, but at least a little bit of spiritual education he should have, so that when he will grow up he will have a choice.