Me: Mm, this lunch is good. Do you think L. is enjoying her lunch right now, too?
A.: What? L. isn't eating lunch right now.
Me: Really? What is she doing?
A.: She's just riding her bus.
Me: Wait. Do you think that L. just rides the school bus around all day long?
A.(a little confused that I would even ask such a question): Yes.
I guess if you watch your sister climb onto the (school) bus in the morning and then you're there to pick her up at the (school) bus stop in the afternoon (and if you're 3 years old), it might throw you for a loop to find out that in between those two, she's actually at school.