What future memories might emerge from boys’ day at Monsterjam?

A quick scan of iconic Norman Rockwell images of grandfathers and grandsons sharing special time includes traditions like fishing, ice-skating, raking leaves and just plain relaxing. Surely there are many more.

The classic painter of traditional Americana died in November 1978 so his work never reflected the birth of monster trucks.

But even had he lived to see their emergence in the early 1980s it’s likely his canvasses would never have depicted a young lad and a granddad peering up in wonderment at the sheer size of those massive tires on the Captain USA, Grave Digger or Batman trucks.

And t...