Here is a quick video of the firefly light I constructed over the weekend. It's dark I know but at least you can see the action of the light.
Youtube is not the best way to show off this light but... its easy.
People seriously pay $200.00 bucks just for that.
It does not look that impressive in this clip. Its totally self contained and the movement is all on its own. It can be placed anywhere and does not need to be plugged in.