Have you heard anything about infrared (IR) photography? Apparently, some cameras can "see" infrared light and others cannot. A simple way to test your camera's compatibility is shown in the photo above. Using your television remote control, snap one photo without pressing any of the remote's buttons, and another one holding down any one of the buttons on the remote. If your camera can see this light, it is capable of infrared photography!
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The next thing to do is to filter out all the rest of the visible spectrum, and that is done with a filter. I found one pretty cheap on ebay..
If I read it correctly, Wikipedia says that when we measure bright sunlight, only forty four percent of that is visible light. A measly three percent of it is ultraviolet, and a whopping fifty two percent of that light is infrared!.