Here's a bit of the conversation that Richard and I overheard on the drive back from Memphis this weekend:
Hannah: When it gets night it's not 'cause the sun is disappearing, it's 'cause the earth flips over.
Sam: Nuh-uh.
Hannah: Yes, because the world is spinning all around.
Sam: NUH-UH, Hannah.
If the world flipped over then all the
cars would flip over, too. And we would flip over and then we would fall off into
outer space.
Hannah: Oh, no no no no. You see, there's a big bubble all around the world and it is keeping everything stuck inside.
Sam: Oh, I get it. And when a rocket goes into the sky it pops a hole in the bubble and then when it comes back it fixes the hole and then it lands. How does it fix the hole?
Hannah: I don't know. Maybe it's 'cause there's two kinds of air. Mom told me about that.
Sam: Yeah. Normal air and fresh air.