Answer:
I am seen in the water. If seen in the sky I am in the rainbow a jay's feather and lapis lazuli.
I plow and plow but never sow.
I build bridges of silver and crowns of gold. What am I?
I have cities with no people, forests with no trees, and oceans with no water. What am I?
I go around in circles but always straight ahead never complain no matter where I am led. What am I?
No matter how little or how much you use me, you change me every month.