Lying in bed before he goes to sleep seems to be where Alex does most of his thinking about the Big Ideas Of Life.
Alex: "Mum, who's your mum?"
Me: "Nanna's my mum."
Alex: "Who's Dad's mum?"
Me: "Ouma is Dad's mum."
Alex: "Who's your grandma?"
Me: "Well I used to have a nanna but she died."
Alex (thinks for a while): "Does that mean some one squashed her?" (thinks some more) "was she really old?"
Me: "No one squashed her but yes, she was really old."
Alex: "What happens to people when they die?"
Me: "They go to meet God and we can't see them any more."
Alex (pleased with himself for coming up with this thought): "Do they get really old, then go up in a rocketship past the clouds to see God? Then, maybe they can be borned again when they get really little like a baby!"