The first time I died, I didn't see God. No light at the end of the tunnel. No haloed angels. No dead grandparents. To be fair, I probably wasn't a solid shoo-in for Heaven. But, honestly, I kind of assumed I'd make the cut.
He knew a lot about his grandparents - and perhaps he feels he's been endowed with abilities to go into people's heads who are long dead - but, to a certain extent, he's making it up.
When I was a boy the Dead Sea was only sick.
Nobody can do for little children what grandparents do. Grandparents sort of sprinkle stardust over the lives of little children.