Disclaimer: I'm not responsible if this happens to be dangerous or you get hurt. I did it at my own risk, and so will you.
Step 1: What You Will Need
1. Two sheets of paper
2. A hand warmer that contains iron powder (I used HotHands® hand warmers)
3. A container to hold the powder in once you're done (I used a small glass vial)
5. A small magnet
6. A small square of plastic wrap