If children understand that beliefs should be substantiated with evidence, as opposed to tradition, authority, revelation or faith, they will automatically work out for themselves that they are atheists.
“A fool thinks himself to be wise, but a wise man knows himself to be a fool.”
“When you're playing music, say for instance, you're playing a part of the band and you're looking at your music, your horn is down into the stand. This way, it's up and it goes right on out to the audience, you know?”