Sorry, there won't be a tutorial for this one. I didn't bother taking pictures throughout the process, because I just wanted it done. I could type up a text one if you REALLY want it, but don't expect it at any reasonable time before halloween.
It's made from a 3" mailing tube from Staples [link]
, cardboard craft boxes, cardboard, 1/4" fun foam, electrical tape and some blue cellophane.
I based the LED set up on this Instructable [link]
in case you are wondering how I did that. It cost me less than 5$ for the parts. If you are planning to do this yourself, you don't actually need the battery snap as suggested by the Instructable. Also, you don't need to solder. I just twisted my wires together as much as I could and taped them.
The LED is green simply because it was 0.25$ for a green one vs 2.00$ for a blue or white one. I figured since I got the darn thing to light up, it's all I really needed to impress people.
I was going to connect it with a tube to the backpack, but I decided against it. I'm already pretty encumbered with the backpack and the rubber gloves. Also, I'm making the bonesaw, and I want to switch weapons with ease at the party. ^^
Download for full view.