Answer:
I build up castles. I tear down mountains. I make some men blind, but I help others to see. What am I?
I run up and down the stairs without moving. What am I?
I'm really blue but when you see me I'm red. You don't see me too often. I'm there for you if you're hurt.
I am an insect. Half of my name is another insect. I am similar to the name of a famous band. What am I?
I'm not alive but I grow I don't have lungs but I need air I don't have a mouth but water can kill me. What am I?
A little house full of meat, no door to go in and eat.