Answer:
I have an eye but cannot see, You'll head inside when you see me.
What goes up when the rain comes down?
I build up castles. I tear down mountains. I make some men blind. I help others to see.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.
This is in a realm of true and in a realm false, but you experience me as you turn and toss.
What language does a billboard speak?
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?