Answer:
I run around the city, but I never move.
If eleven plus two equals one, what is nine plus five equal to?
Hoofed frolicking.
When young, I am sweet in the sun. When middle-aged, I make you gay. When old, I am valued more than ever.
At the sound of me, one may dream or stamp their feet, At the sound of me, one may laugh or sometimes weep.
I am a ship that can be made to ride the greatest waves. I am not built by objects but built by minds.