Here are a few examples of some of my photography, specifically a technique called light graffiti or light painting. By leaving the shutter open on your camera and using a mobile light source in a dark space, you can pretty much transform any area into your own canvas with which you can interact.
All you need is a camera, a stable place to put it, and a light. Any flashlight or even a cell phone will work, but LED lights create very vivid effects. Strobe lights and glowsticks are also fun to use. Let your imagination go wild!
For more of my photography, check out my gallery at www.aeroartist.deviantart.com/gallery