What does the Vice President do?

Above is a video of Joe Biden being interviewed by a 5th grader in Palm Beach. It is a nice little video, but when the child asked him what the Vice President does, I thought Biden's response could have been better. Yes, Joe Biden will serve as an advisor (and a good one he will make), but I have yet to hear a Vice Presidential candidate explain the official duties of the office when asked about it. Remember, there aren't that many.

I realized I am making a bigger deal out of this than I should be, and Biden's response wasn't that bad. Maybe it's just the teacher and Political Science major in me. Hey, it's a better response (and certainly more accurate) than Sarah Palin's. Good Lord!