Answer:
Cycle Cycle Cycle.
What has roots that nobody sees, and is taller than trees. Up, up it goes, and yet it never grows.
Soldiers fight it but never changes.
A tasty reward given to well behaved dogs and kids
What grows when it eats, but dies when it drinks?
Why did the teacher have to wear sunglasses?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?