Answer:
Never ahead, ever behind, yet flying swiftly past; for a child, I last forever; for an adult, I'm gone too fast. What am I?
I am two-faced but bear only one. I have no legs but travel widely. Men spill much blood over me. Kings leave their imprint on me. What am I?
I am perfect with a head perfect without a head; Perfect with a tail perfect without a tail; Perfect with either neither or both.
You hear me speak, for I have a hard tongue. But I cannot breathe, for I have not a lung. What am I?
What invention lets you look right through a wall?
A little house full of meat, no door to go in and eat.