Answer:
Cycle Cycle Cycle.
They come in many varieties: Red, Black, Dead, and Caspian to name a few.
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it
Each morning I appear to lie at your feet, all day I follow no matter how fast you run. Yet I nearly perish in the midday sun.
What is something yet nothing, but if you fill it up it will disappear?
What never gets any wetter no matter how hard it rains?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?