Answer:
Goes over all the hills and hollows. Bites hard, but never swallows.
This thing runs but cannot walk, sometimes sings but never talks. Lacks arms, has hands; lacks a head but has a face.
John was going to a party and, as he approached, he could see in the windows that it was completely packed with people. He went inside only to discover that there wasn’t a single person inside
My second is performed by my first, and it is thought a thief by the marks of my whole might be caught.
Lighter than what I am made of, More of me is hidden Than is seen.
I'm the source of all emotion but I'm caged in a white prison.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?