Creative Ideas on Powerpoint Presentation? Anything!?

Ok, so for my computer class, we need to make a powerpoint on anything we want. It supposed to show that we know how to do powerpoint and stuff. I am from Brazil, so I was thinking of doing something based on Brazil, but that just seems so boring. I want to do something different and really creative, but I can't think of anything. I usually can come up with stuff like this, but I'm having a lot of trouble. The Powerpoint can be on anything, but I can't just me a song, pretty pictures, and the lyrics to the song. It has to have some meaning or depth to it.