Answer:
Mouth up it gets filled, mouth down it gets empty.
What starts with a P, ends with an E and has a million letters in it?
Nothing specific, but more than a few. This many clustered, together will do.
It comes only before, it comes only after. Rises only in darkness, but rises only in light. It is always the same, but is yet always different.
They are two brothers. However much they run, they do not reach each other.
I am a room that has a roof but no walls. What am I?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?