Answer:
I run up and down the stairs without moving
You can see me in water, but I never get wet. 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.
I can be cracked, made, told, and played. What am I?
I am what bring things together. Without me everything you see would be a total mass or debris everywhere.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.