Grandboy (playing a video game): Look, my guy is in a lighthouse.

Me: That’s pretty cool, having a house you can pick up.

Grandboy: Huh?

Me: Because your house is very light. It’s a LIGHT house.

Grandboy: O no grandpa, it’s a house that MAKES light. It’s too heavy to carry. Except for the Hulk, he can pick it up. He can pick up ANYthing.

Me: I bet he can’t pick up GRAVITY

Grandboy: O YES HE CAN. He can pick up THE UNIVERSE

Me: Well, if he’s picking up the universe, what’s he standing on? He has to stand on SOMETHING to pick up everything else.

Grandboy: He just CAN, alright, gwumpa?

Me: Ok fair nuff.

Me (waiting a few mins): So how heavy is light? Can the Hulk pick that up?

Grandboy: Yes he- o wait, no cuz it doesn’t WEIGH anything. You can’t carry it around.

Me (waiting a few mins more): So if light doesn’t weigh anything, how fast can it go? It has to travel because if you’re in a dark room and switch on the light, it moves from the light bulb to your eyes.

Grandboy: Hm maybe BILLIONS and BILLIONS. It’s the fastest thing in the WORLD. That’s why the Flash has LIGHTNING on his costume.

—

Ok that’s general relativity framed up, on to quantum mechanics… just have to make sure he’s learning real science and not comic book physics 😛

Grandboy (reading a name): Maaarrco. Is that a boy or girl name?
Me: That’s a boy’s name. Usually names that end in ‘o’ are boys’ names. Names that end with ‘a’ are usually for girls. Like ‘Maria’ and ‘Sophia’ and
Grandboy: …and ‘Noah’

Me: O look. The leaves are falling because it’s FALL.
Grandboy: Autumn gwumpa. AUTUMN
Me: What are them Yankees learnin’ yew in thet thar school o’yers, youngun?