Answer:
What relies on columns but isn't a house, and asks for help but can't speak itself?
Flat as a leaf, round as a ring. Has two eyes, can't see a thing.
What is full of holes, but can still hold a lot of water?
What is as big as you are and yet does not weight anything?
Which word contains 26 letters but only three syllables?
What is so fragile that saying its name breaks it?