Why does a saline solution conduct electricity? How does a motor work? How does a light bulb turn on? What is the difference between a series circuit and a parallel circuit? How does an alarm work? How do you make a siren? All these questions are answered with this Electricity Workshop. With 22 easy circuits and no soldering required. Requires 4 x AA batteries, not included. Comes with a 48 page booklet. Suits ages 8 years +.