Magnetic ForcesExperiment with the mysterious primal forces of magnets and with the opposing forces of two magnets: attraction and repulsion, magnetic pendulum or compass. How is a chain of nails made? How do iron filings show the magnetic field? What does a double magnetic field look like? The electromagnet is a special magnet: it can be switched on and off. With this knowledge, you can build a motor or a dynamo. Age Recommendation: Experiments and kits for ages 10