Answer:
What's black when you get it, red when you use it, and white when you're all through with it?
This is needed both for courage and hardcover books.
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 kind of running means walking?
What do you fill with empty hands?
What has wheels and flies but is not an aircraft?