Answer:
I am a box that holds keys without locks, yet they can unlock your soul.
In we go, out we go. All around and in a row. Always, always steady flow. When we'll stop, you'll never known. In we go, out we go.
When the son of the water returns to the parent, it dies. What is it?
Through its wounds, water does run. It once held many but now has none. What is it?
If you have it, you want to share it. If you share it, you don't have it.
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?