Easy clean riddles with simple answers

This guy runs fast but cannot stand. People ride this horse that never eats grass. What is it?

If money really did grow on trees, what would be everyone’s favorite season?

If a man carried my burden He would break his back. I am not rich, but leave silver in my track.

I can swim or walk for miles. I’m big with thick, white hair. I live up in the Arctic. What I am?

What is something you will never see again?

What can you swallow than can also swallow you?

What can you hold in your left hand, but not in your right hand?

What is always coming but never arrives?

What kind of room has no doors or windows?

Which city is three fifth chick two third cat and 50% goat?