What goes up and down stairs without moving?

I look at you, you look at me, I raise my right, you raise your left. What is this object?

I have holes on the top and bottom. I have holes on my left and on my right. And I have holes in the middle, yet I still hold water. What am I?

The more there is, the less you see.

Jack and Jill are lying on the floor inside the house, dead. They died from lack of water. There is shattered glass next to them. What are they?

What can you catch but not throw?

Give it food and it will live; give it water and it will die.

Take one out and scratch my head, I am now black but once was red.