Answer:
I know a word of letters three. Add two and fewer there will be. What is the word?
I am bought by the yard but worn by the foot
I am heavy forward, but backward I'm not. What am I?
If you look, you cannot see me. And if you see me, you cannot see anything else. I can make anything you want happen, but later everything goes back to normal. What am I?
I cannot be other than what I am, until the man who made me dies. Power and glory will fall to me, only when he last closes his eyes.
What did the piece of wood say when he saw the screwdriver and screws approaching?