Answer:
Lighter than what I am made of. More of me is hidden than seen. What am I?
I love spinach.
I am the only word that looks the same when spelled upside down.
You walk into a room with a rabbit holding a carrot, a pig eating slop, and a chimp holding a banana. Who is the smartest animal in the room?
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
What gets bigger the more you take away?