Find some small application of elementary physics in everyday life. It should draw upon only topics we have covered (but by the end of the semester we will have had a look at most of physics, so this is not very restrictive). You should point out how physics applies, and how it clarifies something about this topic in some way, using only the simple kinds of arguments we are learning to make. This is not an easy thing to do! In particular, I hope this means you won't be able to just find something on the web, and appropriate it wholesale, because nothing on the web is this stripped-down. It should just be one essential physical idea, clean and clear, and perhaps very approximate, or even speculative -- that would be fine. Write up your idea in a clear exposition of maybe one page. I'll maybe make suggestions when I see it, and we will refine it into something you can present in a 5-10 minute topic for the class as a whole.