Answer:
I have no weight but I could destroy a mansion. What am I?
What happens when you throw a green stone into the Red Sea?
I am the building with the most number of stories.
You find me behind the stars; or in a sixth seventh or third. It takes something round a computer and me to make pie. I am bigger than anything you can think of.
What is full of holes but still holds water?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?