Making an Electric motor for a Science Fair?

I have a Science Fair project due here in about a month. Im in 7th grade but I'm smart for my age and my teachers expect more of me, so im doing something a little more intricate. Can you give me some ideas and/or websites where I can build an electric motor. I just need research on a basic concept before I begin my experiment. I thought I should study electromagnetism, but if you have any suggestions, please list them. I need at least 4 sources, which include- Encyclopedia, Websites, and other book sources. I picked this project because Electricity and Magnetism is a broad subject to research on, but if you have any other project ideas, im still open to suggestions. I know Wikipedia and such websites can give me extended information about this subject, but if you know anything about it, or have a helpful website, your contribution would be appreciated. Thanks for your time.