Answer:
When liquid splashes me, none seeps through. When I am moved a lot, liquid I spew. When I am hit, color I change. And color, I come in quite a range. What I cover is very complex, and I am very easy to flex.
You need a key to receive an answer from me. The answer you'll find is straight from your mind. What is it?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Hold the tail, while I fish for you.
What can be filled with empty hands?
What never gets any wetter no matter how hard it rains?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?