Answer:
What is black when you buy it red when you use it and gray when you throw it away?
I fill a room but take no space. What am I?
I have a lot to say but can't be heard because I can't speak one single word. What am I?
What begins with an E but only has one letter?
When it comes to me you go on red and stop on green.
What did the piece of wood say when he saw the screwdriver and screws approaching?