Experiment to determine which materials are magnetic and which are not. Learn about magnetic poles and magnetic fields. Discover how Earth behaves like one giant magnet, and how we use compasses to take advantage of this phenomenon to determine which way is north. Conduct a series of experiments to learn first hand how magnets behave and interact under different conditions. Make invisible magnetic fields visible using iron filings in an enclosed transparent box. Build an electromagnet to learn how electricity relates to magnetism. Finally, have some fun with what you have learned by playing some games with magnets. The full-color, 48-page manual guides your experiments with illustrated step-by-step instructions.