In the book, the students are in class, and suddenly there is lightning and thunder outside, and the lights in the classroom flash and then go out. There was a power outage, and the teacher took the children on the school bus to see the reason for the power outage.

Miss Fries, the teacher of Curly, pressed a button on the school bus and the school bus began to change lanes. They become less and less, smaller and smaller until they can get into the high-voltage line. They followed the electronics to the power plant, saw the turbine generator and learned about hydropower, wind power, thermal power and so on. Then came household appliances such as electric light bulbs and microwave vacuum cleaners. How does it work?

The book takes the magical school bus as the carrier, and makes children know the colorful electric world and feel the beauty and magic of science with vivid and novel ways, interesting stories and easy-to-understand language ~