Conversation on walking through a churchyard today

"Don't climb on that [tomb], HackneyChild."
"Why?"
"It's disrespectful."
"Why?"
"Because that's where people go when they die."[realise immediately have opened can of worms].
"What is die?"
[oh dear.] "It's, er, when someone isn't here anymore. [lame.] Like great grandad, he was here and now he isn't."
"Where has he gone?"
[can of worms part two.]. "Er, I don't know."
"Maybe the supermarket."
"Er, yes. Maybe."

Later I tried again with a feeble explanation involving flowers, but he didn't seem that bothered, thankfully. I don't know if a supermarket based afterlife would be heaven or hell. Maybe it depends if it was Waitrose or Tesco.