Answer:
In the sun I like to play; in the rain I goes away; walk or run I always follow; in the mud I always wallow.
I have all the knowledge you have. But I am so small that I can fit into your hands. What am I?
What loses its head in the morning but gets it back at night?
I am long and slim works in light. Has but one eye and an awful bite.
I saw the dead bring forth the living. I saw the living bring forth the dead. What did I see?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.