Apparently, they talked about planets today at school. We had a little conversation about it in the car on the way home from the grocery store.
Caroline: Mom, I really like the solar system.
Mom: When did you learn about the solar system?
C: Today! We live on Earth.
M: We do. That's right. Did you learn about other planets?
C: Yep, there is one called JUPITER!
M: Yes, there is one called Jupiter.
C: There's even a green one!
M: Oh, cool. Are there more?
C: Yeah, lots more. But those are the only ones that matter.