More than that, it's getting kids through adults. Kids can't intellectually defend themselves, so indoctrination of any sort is easy to accomplish. Thus, camps like those from Jesus Camp produce the JIA's of the future (and those who are far worse).
I have a friend who's an atheist and his brother is Catholic. The parents are agnostic/atheist, and very informed non-theists. When the other son became Catholic, they supported him. It's a refreshing approach: here's what we believe and why, but you're free to search on your own without fear of family disappointment or negative repercussions. Not surprisingly, it was a group of over-zealous Christian prosthelytizers (according to my friend) that prodded him numerous times toward becoming a Catholic, even telling him people that he "shouldn't" hang out with because they were "bad influences." They did intervene at that point some, but it's a sad statement in general.
The overwhelmingly biggest stat that determines religion is what your parents are/were. Almost sickeningly so. If religion really was the cat's pajamas, they wouldn't need to covet their supposed stranglehold on the truth so tightly. It would thrive on its intellectual merits, not on hereditary inheritance.