Step-by-step tutorial
Step 1
Wrap the magnet wire around the nail 20 times. Trim the wire, leaving a couple of inches sticking out at the top and the bottom.
Step 2
Use the sandpaper to scrape the coating off both ends of the wire.
Step 3
Hook up the alligator clips to the battery pack, then connect them to the wires.
Step 4
You've made a magnet! Now bring the tip of the nail close to some bent staples. How many can you pick up?
Warning
When you're done tinkering, don't forget to disconnect the wire. The battery and wire can get hot!