Answer:
Long and think, red within, with a nail at the end.
I run around the city, but I never move.
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
It is weightless, you can see it. If you put it in a barrel it will make it lighter?
What word in the English language uses all five vowels plus Y in alphabetical order, and uses each only once?
Do what he says and you'll be fine, don't and you lose the game.