Answer:
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
What must be looked through in order to see?
A red house is made out of red bricks. A blue house is made out of blue bricks. What is a green house made out of?
You could do this to a motion, see it on a watch, or place this in a race.
What cannot talk but will always reply when spoken to?
Do what he says and you'll be fine, don't and you lose the game.