Answer:
Sends paper without using the post office.
What hangs in the sky by day but at night goes away?
It's what light turns into in the night
You can't keep this until you have given it. What is it?
What has a head yet it never weeps, has a bed but never sleeps, can run but can not walks, and has a bank but not a cent to its name?
What is full of holes but still holds water