Answer:
He's small but he can climb a tower.
Mouth up it gets filled, mouth down it gets empty.
What hangs in the sky by day but at night goes away?
What has one hand longer than the other, and goes on all day and night?
What has four fingers and a thumb but is not alive?
What language does a billboard speak?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?