Acting you age, however you act

I can't even vote on Mars

Have you ever been told to "act your age"?

You were probably doing something immature or foolish at the time and the speaker undoubtedly wished to admonish you.

Now you can prove that you are acting your age by informing your would-be scolder that you are only 12-years-old (...on Mars).

Nah-na-na-na na-naaah.

Your Age on Other Planets