I've just read a book by Rob Parsons about nurturing children's faith, called "Getting Your Kids through Church without them Ending up Hating God".
I highly recommend it.
Rob Parsons runs a charity in the United Kingdom called Care for the Family. I might be wrong in likening it to Focus on the Family in the US, but it seems to be an organization along the same lines.
You can see my review about it at amazon.co.uk.