Scientific Explorer Circuit Board Electricity Kit Experiment with conductors, a real working circuit board, wires, light bulbs and more for high-voltage excitement Learn about electricity, series, circuits, switches, voltage, current, resistance and other concepts important for electricians and others in the field Safe, educational electrical fun that requires (4) "AA" alkaline batteries (not included), Includes a circuit board, battery holder, strip, bulbs, holder, wires, code switch, washers, brads, resistors, jar, springs and manual Recommended for children 8 years of age and older with adult supervision