Magnetizer/De-magnetizer

In this exhibit, we placed the tip of the modified screwdriver between the magnets, and we removed it at the same manner after a few seconds. Then, we touched the top of the metal washer with the screwdriver and picked it up, and we rubbed the tip of the screwdriver against the top of the magnet, and picked it up.
Magnets attract some materials. The tip of the screwdriver is made up of materials that are attracted by magnet. They are called magnetic materials. All these materials are metals. It is possible to magnetize and de-magnetize magnetic materials. Stroking a magnetic material such as the screwdriver with a permanent magnet causes tiny magnetic domains in the material to align. The material itself becomes a temporary magnet. It attracts the washer which is a magnetic material.
Rubbing the screw driver’s tip on the top of the ring magnet will arrange magnetic domains in random. The screwdriver becomes non-magnetic again. That is why it cannot pick up the washer.