Answer:
I build up castles. I tear down mountains. I make some men blind, but I help others to see. What am I?
I smell like blue paint pours like green paint and I look like a red truck.
The more holes you cover the lower I go.
What has feet and legs, and nothing else?
Crooked as a rainbow and slick as a plate, ten thousand horses can't pull me straight. What am I?
You can always see it, but it's too far away to touch. Mountains rest on it, and at sea it surrounds you. What is it?