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.
I am whole but incomplete. I have no eyes, yet I see. You can see, and see right through me. My largest part is one fourth of what I once was.
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
I run around the city, but I never move.
Hold the tail, while I fish for you.
What is it that makes tears without sorrow. And takes its journey to heaven?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?