While we're at it, lets get the S word out of the way - Steampunk. There, I said it.
Really though, I would like to present what I am tentatively calling the magnum opus of my undergraduate career (barring something really clever coming up in the next two months).
Three found object rayguns, each with their own effect. The small silver unit hides a 6 shot flash cannon connected to the original trigger, the large orange and brown unit contains a blinding flash bulb and the standing turret has a pinpoint light effect, Jacob's ladder and fog machine. All three together took about 6-8 months of work spread out with a full class load and part time work study (scenic design major, gotta build the sets...)
I built these primarily to teach myself about leds and basic electronics. The background is my apartment/workspace in Richmond, Virginia.