Change the magnets so that poles are unlike. Tap the paper. Observe the new pattern. When I raise my hand, tell me together what you call the space around a magnet. Have various magnets available for students to choose from.
Students choose magnets to make designs.
Place a file card over the magnets. Spoon or sprinkle iron filings on the cards. The filings will form a picture because of the magnetic fields. Spray the cards with hair spray or fixative. Dry and spray again before removing magnets.