Gwumpa joke > Dad joke, every time

Me: Hey you know why this (points to a picture) is called a dinosaur?

Grandboy: Why Gwumpa?

Me: ‘Cuz they’re dead. See? DIEnosaur.

Grandboy: Yah! They DIEnosaurs

Me: And if they were still alive they’d be LIVEasaurs

Grandboy: NO STAAAP