A device, a method to switch bodies, and it's effects on society. You might talk about how switching two bodies, like you and a person from Africa or China, would affect those people.
Talk about how messed up the world is. for budget cuts, we can still construct because of lobbying efforts. New books and teachers don't get votes. But construction does. And for physics textbooks. They'd be 10 times more efficient if they'd be on CD's. But do CD's make money? No, books do. I'd say, more like a waste of money.