Answer:
What has a bottom right at the top?
What goes further the slower it goes?
Twigs and spheres and poles and plates. Join and bind to reason make.
Break it and it is better, immediately set and harder to break again.
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?