Answer:
As round as an apple. As deep as a cup. All the king's horses can't pull it up.
What flies without wings?
Some live in me, some live on. And some shave me to stride upon. I rarely leave my native land. Until my death I always stand. High and low I may be found. Both above and below ground.
The sharp slim blade, that cuts the wind. What is it?
I can sizzle like bacon, I am made with an egg. I have plenty of backbone, but lack a good leg. I peel layers like onions, but still remain whole. I can be long, like a flagpole, yet fit in a hole.
What is the middle of water but is not an island?