You Will Need:
Shoebox lid, iron filings or metal objects such as nuts, bolts, paper clips, a strong magnet.
Put the metal objects inside the shoebox lid. Have your child hold the strong magnet underneath the box. As the magnet is moved, it will attract the metal pieces and they will move with it.
Be careful not to use items that are of choke-able size with young children. If your child enjoys experimenting with magnets, be sure they know not to put magnets on computers.