I agree that it's hard to teach children to question at such a young age - and probably not even appropriate. This is an age where they need structure, and religion is nothing if not structured.
I think I will probably end up exposing Moppet to a shallow version of religion - telling her stories from the Bible, celebrating festivals - and when she is old enough to ask questions, I will try and answer them as honestly as I can.
But the last word on this for me is my dad's. He wrote me an email in response to the post, and with his permission, I'm quoting some parts from it here because I think it's really worth sharing:
You're right, "Parents are such enormous influences on their children." That's why the question of parents' responsibilities in their children's development is so important. Are we doing the right thing for our children when we put them through certain experiences and prevent them from others?
My answer is simple. There is no right way to bring up children. In spite of the mountains of parenting wisdom all around us, every parent has to go through the trial and error method to bring up their kids. One is never sure one is right. One has to do what one believes is right, and leave it there. Fortunately for children, parents are not the only influencers. In fact, the tendency of adolescents to rebel against their parents is one of the most beautiful things in life. So parents should not take full credit or blame for the way their children come up.
While there is no one right way to bring up children, I believe there is one wrong way. That is being too sure of oneself and being rigid about it.
Be yourself. Be honest with yourself and with Moppet. You will influence her thinking, but don't for a moment think that it will be so deep that there will be no room for other influences.