Harrison: "Mom, when I grow so big and turn 100 years old will I be able to destroy the world?"
Me: "No, and why would you want to destroy the world??"
Harrison: "Will I be able to hold houses on top of my head and be super strong?"
(This is the only example I could find of a really strong old man. Unfortunately, there were no images on Google of an old man holding up a house. )
Me: "No, you won't be able to do that either."
Harrison: very exacerbated, with arms tossing around, "Well, then, what will I do when I turn 100?!"
Me: "You give thanks to God you've lived to see a hundred and call it a day."
Harrison: "That doesn't sound like very much fun."