This is an easy one, but all your geeky friends will want it.
- two network cards (or something similar, a circuit board with a regular size)
- paper (the easy way is to cut an old notebook)
- a spiral (same as before)
Step 1: "Clean" the cards
First, dismantle all of the old cards, leaving only the printed circuit, and maybe the processor.
You can use a soldering iron for it.
Updated: In fact, I used the pliers, it's quicker.