Answer:
Small and bearded, both in the real world and in stories.
A metal snake that runs on tracks.
He prefers to travel on vines and pal around with gorillas.
When one does not know what it is, then it is something; but when one knows what it is, then it is nothing.
What is the sun’s favorite day of the week?
What never gets any wetter no matter how hard it rains?
Kids
Animal
Difficult
Easy
Food
Funny
Logic
What am I?