Answer:
Upon me you can tread, though softly under cover. And I will take you places, that you have yet to discover. I'm high, and I'm low, though flat in the middle. And though a joy to the children, adults think of me little.
Where humans breath liquid?
I grow for a surface, even if you cut me. I continue to grow even after death.
A hole leading in, a hole leading out, we connect to a cavern that is slimy all throughout. What are we?
It flies when it's on and floats coming off.
What covers its face with its hands, speaks no language, yet most known what it's saying?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?