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.
“I always have the most fun on the Fourth of July. You don't have to exchange any gifts. You just go to the beach and watch fireworks. It's always fun.”
“If you don't give your kid freedom to make choices with money, including stupid choices, he'll make plenty when he gets to college.”