Ideas for a stats project?

Our data management class got the unit-ending project for statistics a few days ago, and what we have to do is form a procedure, collect data (independent and dependent variable kind of data), and perform one and two variable analysis (correlation, regression, etc) on it. Any ideas for some interesting data to collect? My partner and I have nothing. It's due next month, so I have a fair amount of time to collect data, it just needs to be cheap and not convoluted.