Answer:
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
There was a girl half my age when I was 12, now I am 66, how old is she?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I am a lunch money thief
I walk on 4 legs in the morning 2 legs at noon and 3 legs at night.
The answer I give is yes, but what I mean is no. What was the question?