Magnetism has fascinated people for thousands of years. Electricity depends on electrons jumping from atom to atom, and magnetism adds a new twist: spinning electrons. Electromagnetism make possible most of the modern miracles we take for granted today--electicity, television, computers, and the internet.

A word of caution: Some magnetic toys contain very small and very powerful magnets. Such magnets pose a serious health risk if they are swallowed. Neodymium magnets are especially dangerous, so if you purchase them, keep them away from young children.