Answer:
I break down buildings, I crumble mountains but you can't see me. What am I?
I have a head tail but no arms and legs.
Lighter than what I am made of. More of me is hidden than seen. What am I?
I am in the middle of water but am not an island.
I am the kind of food monkey likes and people slip on me and fall in cartoons.
What did the piece of wood say when he saw the screwdriver and screws approaching?