This was a conversation in my class today...
Me: We live in Texas, but Texas is not the biggest state in the United States. Do you know which state IS the biggest?
Kid: The world!
Me: No, the biggest STATE.
Kid: The planet!
Me: No. The whole planet is not a state.
Kid: The earth!
Me: You can say it all the different ways that you want, but it's still wrong!