I am really impressed with the discussion that is happening. Some things I want to clear up: Ralph is standing on his head because he's a boy and he's just messing around. I have no idea why Ralph is intrigued by the color gray. To be honest, I haven't really noticed that before in the book. The man with the megaphone (I think) is Ralph blowing the conch. It makes a loud humming noise, so the kids mistake it for a megaphone. Finally, the kids are on the airplane without adults because they have been evacuated from a war. They are from a boarding school.
Hope that answers some of your questions. Let's ponder this:
There is an emmerging sense of evil on the island. Where do you think it is most prevalent? How can we relate this to
Macbeth?