Answer:
I always murmur but never talk. Always run but never walk. I have a bed but never sleep, have a mouth but never speak. What am I?
Crooked as a rainbow and slick as a plate ten thousand horses can't pull me straight.
A piece of paper that takes most people 3 or 4 years to get.
If a man carried my burden, he would break his back. I am not big but leave silver in my tracks. What am I?
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
When is it bad luck to see a black cat?