My four-year-old son Nicolas was telling me about sharks the other day, and when I said something about sharks living in water, he said "No, sharks don't live in water, they live in the sea."
me: But the sea is made of water, right?
Nico: (after thinking about it a bit) Yes... There was a great big water bottle, and it spilled on the sand and made the sea!
So there you have it. And that's why the sea is made of water. ;^)
Okay, one more cute kid story:
My little Nico usually only speaks to me in English, but every now and then he'll learn something at school or from his French grandma and not know the corresponding words in English to talk about it. When that happens, and Nico wants to tell me about something he can only describe in French, he switches the language of the conversation as follows:
Nico: Maman ? (French for Mommy)
Nico: Non, tu dis "Oui". [No, you say "Oui".]
me: Oui ?
Then he launches into his story in French.
(He's curious to know how to say the same thing in English, so I generally translate the things he tells me into English for him.)
Okay, one last one:
Recently Nico wanted a particular toy that was at a toystore on the other side of town. So we walked over there, and on the way back, when we were almost home, Nicolas started getting tired. He then made the following observation:
"If the store is far away from home, that means home is far away from the store."
The kid's a genius -- already formulating his own reciprocity theorems!! He's sure to be a great Mathematician one day!!! :D