Answer:
I build up castles. I tear down mountains. I make some men blind, but I help others to see. What am I?
I make you weak at the worst of all times. I keep you safe I keep you fine. I make your hands sweat and your heart grow cold. I visit the weak but seldom the bold.
When it comes to me, you go on red and stops on green. What am I?
My first part compliments people. My second part makes things known. My third part hurts feelings. My fourth part may hold a precious treasure. My fifth part is used when sharing fancy beverages.
I am an activity involving pins flying in the air.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.