Step 1: Parts and Tools
-about 1' of wire
-1 red LED
-Sandwich ziploc bags box
-a switch of some sort(or if you dont mind just wire it so that its always on)
-a clear marble
-and a battery holder(2 x AA)
Step 2: Wiring the LED
Step 3: Cutting the main body and lens
Step 4: Make a holder for the LED and marble.
-before you tape the marble on put the pen tube through a cardboard circle that has been painted black.
-after the tube is through the round piece of cardboard then you can tape the marble on to the tube.
-the tape the round piece of card board to a cylinder. I found a black ring but you could probably use a toilet paper roll or something.