Answer:
If I have it, I don't share it. If I share it, I don't have it. What is it?
What kind of nut is empty at the center and has no shell.
The strangest creature you'll ever find has two eyes in front and a hundred behind.
This only turns over once you have travelled very far. What is it?
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
Why did the stadium get so hot after the game?