Answer:
It cannot be seen, it weighs nothing, but when put into a barrel, it makes it lighter.
It floats over the land, It cuts the tallest mountain, Its voice is like a fountain, Its body like a snake, Will flow into a lake.
I work when I play and play when I work.
When you stop and look, you can always see me. If you try to touch, you cannot feel me. I cannot move, but as you near me, I will move away from you.
What five-letter word becomes shorter when you add two more letters?
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?