There are a lot of options for your science project. But first of all, is there a specific topic that was assigned to you by your teacher? If so, you should research on that topic. If you get to choose your own topic, you should find something that interests you or inspires you because you will be devoting a lot of time and effort in the project. Your experience will be much more rewarding if you find a topic that you genuinely like. Look around you for inspirations; sometimes the best ideas for a science project may be right in front of you.