Abstract: According to principles of the invention, an educational device is provided for investigating and teaching about electromagnetic fields. The device includes a pair of toroid magnets each having a north pole and a south pole. As is known, a toroid magnet is generally doughnut-shaped with a hole in the middle; one side is north, the other south. The toroid magnets are held together by a magnet support member. The magnets are positioned with their holes aligned to form a common passageway. Like magnetic poles face each other so that the magnets of the pair repel each other. An electrically conductive, metallic, L-shaped rod extends through the common passageway formed by both holes of the pair of toroid magnets. A rod support member is coupled to the base of the rod in a manner to permit the rod to pivot about its base.