Answer:
Without me everyone would lose their head. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
I walk on 4 legs in the morning, 2 legs at noon, and 3 legs at night. What am I?
Iron roof, glass walls, I burn and burn but never fall. What am I?
What room do ghosts avoid?
What has wheels and flies but is not an aircraft?