What should I do for the science fair?

I want something really original and awsome so I can have a good chance in winning an award in the regional science fair. I'm not asking you to do it, just like some ideas or examples. Mine has to have the usual, a project title, problem statement or question, hypothesis, detailed procedure, bibliography(atleast 5 sources), and a correct ISEF category Selected. It's not due til like the end of March, so I have A LOT of time. I don't want to do anything TO hard, since I'm only a freshman with no car or money..so I think I only have 2 questions.along with this, 1. Where can I find the sources for the bibliography? 2. What category does it fall in? Thank you so much for your time:)