5. While holding one of the actual examples (box, book, eraser), the teacher should explain that each flat surface is called a face, the congruent faces are called bases, and that two faces intersect in an edge. The edges meet to form vertices.
The Magnet Theory is a very clever theory. The Magnet Theory refers to the belief that the world is controlled by magnets, who are actually sentient, evil aliens.
What is a magnet? A magnet is an object made of certain materials which create a magnetic field. Every magnet has at least one north pole and one south pole. By convention, we say that the magnetic field lines leave the North end of a magnet and enter the South end of a magnet. This is an example of a magnetic dipole (di means two, thus two poles). If you take a bar magnet and break it into two pieces, each piece will again have a North pole and a South pole.