Answer:
Long and thin red within with a nail at the end.
I build up castles. I tear down mountains. I make some men blind, I help others to see. What am I?
I wear a green jacket on the outside white jacket as a second layer and red jacket inside. I am pregnant with a lot of babies. (one word)
I can be hairy and itchy all over. I can be the scariest thing you have ever seen. I stand in the middle of nowhere, hanging on a stick. What am I?
When I am caught, I am thrown away. When I escape, you itch all day. What am I?
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.