Answer:
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
What is seen in the middle of March and April that cannot be seen at the beginning or end of either month?
My head bobs lazily in the sun. You think I'm cute for my face is yellow my hair is white and my body is green.
In Paris but not in France the thinnest of its siblings.
I am gentle enough to soothe your skin, light enough to fly in the sky, strong enough to crack rocks. What am I?
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.