READ THE WOLE INSTRUCTABLE BEFORE BUILDING!!!
Step 1: Danger!!!!
Step 2: What you need
Sheet Metal, Mine was 12x18 but you can go larger or smaller if you want ($5)
Page protectors ($3 for 100)
Speaker wire($5 for 100 feet)
Rigid Copper Wire(Depends on where you buy it, 1foot should only be a couple cents, you need 3)
Neon Sign Transformer($25 on eBay)
What you need to take the photo:
Digital camera that can take a long exposure (10 seconds minimum)
Small metal objects, or you can dip plastic items in salt water.
Total costs: about $35 but if you use a flyback transformer or other high voltage source it will be cheaper...