Answer:
A harvest sown and reaped on the same day In an unplowed field, Which increases without growing, Remains whole though it is eaten Within and without, Is useless and yet The staple of nations.
What do you have when you're sitting down that you don't have when you're standing up?
What comes once in a minute, twice in a moment, but never in a thousand years?
A home of wood in a wooded place, but built not by hand. High above the earthen ground, it holds its pale blue gems. What is it?
It flies when it's on and floats coming off.
I am your mother's brother's only brother in law. Who am I?