Answer:
What wears a coat in the winter and pants in the summer?
I'm white, I'm round, but not always around. Sometimes you see me, sometimes you don't.
A box without hinges, lock or key, yet golden treasure lies within.
I never was, am always to be. No one ever saw me, nor ever will. And yet I am the confidence of all, To live and breath on this terrestrial ball.
What is lighter than what it is made of?
It rows quickly with four oars but never comes out from under his own roof. What is it?