Answer:
Large as a mountain, small as a pea, Endlessly swimming in a water-less sea.
It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?
They're up near the sky, on something very tall. Sometimes they die, only then do they fall.
What has wings, but can not fly. Is enclosed, but can outside also lie. Can open itself up, or close itself away. Is the place of kings and queens and doggerel of every means. What is it upon which I stand? Which can lead us to different lands.
Long and slinky like a trout, never sings till it's guts come out.
What never gets any wetter no matter how hard it rains?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?