All you have to do is teach your kids to think critically, require evidence, and ask questions. That's how my parents raised me, and much to their chagrin, I didn't follow in their footsteps as a Christian.
Even if the open windows of science at first make us shiver after the cozy indoor warmth of traditional humanizing myths, in the end the fresh air brings vigor, and the great spaces have a splendor of their own - Bertrand Russell