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.
It is a sound of empty, speak and it'll talk back plenty. But all the more you yack, you'll get the same words back.
I pass before the sun, but make no shadow.
He has one and a person has two. A citizen has three. And a human being has four. A personality has five. And an inhabitant of earth has six.
What has roots as nobody sees, is taller than trees. Up, up it goes, and yet never grows?
If I say "everything I tell you is a lie", am I telling you the truth or a lie?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?