Set the flat head of the screw on the disc magnet. This will magnetize the screw.
Bend the copper wire into the shape of a "V."
Attach the pointed end of the magnet-and-screw combination to the positive end of the battery. The magnetized point will hold the screw and magnet in place.
Press and hold one end of the copper wire to the negative end of the battery with your finger. This creates an electrical connection from the negative end of the battery to the wire.
Lightly touch the free end of the wire to the side of the disc magnet. The magnet-and-screw combination will begin to spin immediately. The longer you hold the wire to the magnet, the faster the screw will spin.