Battery (button type) 2032 3V
Clay, Scalpy, Playdoh, something....
Take the battery and the LED, slip the longer wire (remembering that, that is the + one) and slip that over the top which should have the positive sign one it. same with the bottem
(repeat with more led's)
Step 2: Step 2
Tape to secure the LED's on the battery
(Glue or epoxy could be used if you really want)
Step 3: Step 3
Now take your clay or what ever and form it around the battery so that the LED's are sticking out at one end. Make it semi long like a dart kinda just thicker... any way now your done. Take that and whip it against bricks or concrete.
I know that scalpie doesn't work all that well, playdoh or silly puddy might work better, its still in the beta stage (lol) so I'm profecting it but I though I'd let you guys have a wing at it to see what you come up with. (Ihave pics but their not working right now, but they should be up soon.)