Answer:
I am easy to see but no one likes looking at me. Without me there would be no you. I can make you complain or make you happy. But you almost always take me for-granted.
I am a kind of coat that can only be put on when wet.
Flat as a leaf, round as a ring; have two eyes, can't see a thing. What am I?
I can be swallowed, but I can also swallow you. What am I?
I go up and down at the same time. Up towards to sky and down towards the ground
Bury deep, Pile on stones, My mind will always Dig up them bones