Answer:
You bind me and I walk. You loosen me and I stop. What am I?
If I drink, I die. If I eat, I am fine. What am I?
I am heavy forward, but backward I'm not. What am I?
What goes up and down stairs without moving?
I must be broken before you can use me.
What did the piece of wood say when he saw the screwdriver and screws approaching?