Answer:
Face with a tree, skin like the sea. A great beast I am. Yet vermin frightens me.
There is a puzzle which can be asked all day with a different correct answer each time. What is the puzzle?
Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks.
A box without hinges, lock or key, yet golden treasure lies within.
Twigs and spheres and poles and plates. Join and bind to reason make.
People take me on walks and I run and have fun. What am I?