In "Lord of the Flies", what is the fair boy's attitude when he realizes that there may be no grown ups on the island?

Piggy asks, "Aren't there any grownups at all?"

"I don't think so."  The fair boy said this solemnly; but then the delight of a realized ambition overcame him.  In the middle of the scared land he stood on his head and grinned at the reversed fat boy."

The "fair boy" we soon learn is Ralph.  He is excited about the prospects of being in a situation where there are no adults to tell him what to do.