We turn on the light when it gets dark. But how does the light go on? Can the bulb do it alone?

In order to show children the principle of light emitting and cultivate their love for science, Hudong Green Energy Environmental Protection Service Center recently did an experiment, i.e. bulb goes on, for the children at SIP Haiyue Community. 

Having prepared battery, bulb, copper thread, iron wire, aluminum wire, cotton thread, plastic pipe, paper rod, etc., the children decorated the lamp cover and lamp base by painting, cut and paste or their original methods. Then they glued the lamp cover and fixed it to the lamp base when it went dry. Under the teacher's guidance, the children experienced for themselves the happiness of experiment.