Answer:
I am Invisible Man's drink at snack time
Many people own a copy of me. Without me the world would fall.
What is always in front of you but can't be seen?
There was a green house. Inside the green house there was a white house. Inside the white house there was a red house. Inside the red house there were lots of babies. What is it?
What can travel all around the world without leaving its corner?
What language does a billboard speak?