Answer:
I run around the city but I never move.
What do people spend a lot of money on every year, but never want to use?
My keepers feed me colored balls. With sticks they store on my den walls. Sometimes I store them in my pouch. Sometimes deep in my belly; ouch!
Light hides me and darkness kills me. What am I?
I am round as an apple, deep as a cup. All the King's horses can't pull me up. What am I?
Give it food and it will live, give it water and it will die.