Here's a few...
start w/ a lux (wattage of your choice) and a bare sink tube (once again, your choice of diameter)
1 36" polycarb tube
1 roll of poly wrap
Any ONE of the following:
VCR
DVD player
any one of the old cartridge systems ie: Nes, SNES, 64, Genesis, Atari etc...
an old printer
a vaccum cleaner
any of the above would work. I have done the vacuum cleaner and vcr one already, and they turned out rather nice! All the resistors, wires and the materials to make a battery pack/chassis can be found in any of the above items w/ the exception of maybe the vacuum for the resistors. If I remember correctly, I think I yanked the ones I used for my vacuum saber from an old cordless phone.
Have fun!
Also, if you can take some quick video of the process, I'll feature this build on "Junkyard Sci-Fi". First episode airs next month people!!!
Peace,
Silkvein