Things You'll Need
Instructions
Find the south end of each magnetic pin or needle by holding a compass to the pin. If the compass points south, you have found the south end.
Push the south pole of the magnet through the cork so just a small amount of the tip is pointing through the opposite side. The tip of each point that pokes through the cork should measure the same length as the others.
Drop the magnetized corks into the bowl of water, with the long end of the magnet submerged in the water.
Find the north end of the large, flat magnet with the compass. If the compass points north, you have found the north end.
Hold the large magnet over the bowl of water, and watch as the floating magnets begin to move. After a few moments, four of the magnets will make a perfect square, with the fifth magnet bobbing directly in the center of the square.