This comprehensive 29-piece kit introduces students to the basic principles of electricity and magnetism, including magnetic attraction and repulsion, magnetic fields, and electromagnetism. Electrical circuitry, voltage, current and resistance are covered, as well as series and parallel connection. Force in a magnetic field and electric motor basics are included, and light emitting diodes and a relay are provided for further investigations. The components are mounted on sturdy molded bases and connections are made with reliable screw terminals. An activity guide details the experiments. Requires three AA batteries (not included).