A religion has to have adherents that fundamentally agree on many points. Atheists don't do that. They think for themselves. I think this is an ideal goal in raising children. There may be some atheists who try to indoctrinate their children with their ideas, but this is not the usual case. Some atheists have gone so far as to allow their children to go to Sunday School just to see what it is or to take them to a church service for their education.

Agreed. also, any "atheist" who tries to indoctrinate their children with their notions is not an atheist. There can be be no certainty in atheism (unlike religion), so indoctrination is not an option. Our children went to schools which were not faith schools but which abided by the law of the land in providing acts of "daily worship". We could have withdrawn our kids from those lessons, but we thought it far better to let them not stand out from the crowd (no-one else withdrew their kids) and provide the counterbalance at home. They are, now in their thirties, both free thinkers and both are atheists with no pressure whatsoever from us. I tend to think that they're the lucky ones.