Answer:
Only one color, but not one size. Stuck at the bottom, yet easily flies. Present in sun, but not in rain. Doing no harm, and feeling no pain.
Something wholly unreal, yet seems real to I. Think my friend, tell me where does it lie?
What begins and has no end? What is the ending of all that begins?
When I get closer my tail grows longer, but when I go away my tail leads the way.
Walk on the living, they don’t even mumble. Walk on the dead, they mutter and grumble
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?