Answer:
White and thin, red within, with a nail at the end. What is it?
This is the main ingredient in spaghetti and Mac-ยญN-ยญCheese.
What can you keep after giving it to someone?
Used to keep prisoners silent and to make temporary repairs on cars.
What has many keys but cannot open a single lock or door?
Two little holes in the side of a hill. Just as you come to the cherry-red mill.