I'm still wondering how to deal with the possibility of my daughter assuming something is just a fun play-along story (Tooth Fairy, Father Christmas, Jesus, the Liberal Democrats) and then encountering a playmate who doesn't know it's a story. The fallout should be interesting, at least. I am torn as to how to tell her when it's rude to take away people's erroneous beliefs.

Edit: Oh Dawkins, she's likely to go to the local Church of England primary school. (My girlfriend is an active member of said church.) [All the other local primaries are Catholic, dismal failures or both.] This will be tons of fun for everyone, I'm sure (he said with trepidation). The vicar could out-argue a six year old; I'm really not sure about many of the church members, however.