One night, Daisy said, "I'm going to the supermarket to buy a bag of sweets. Is there anything I can bring you? "
Benny, Daisy's brother said, "Yes. Can you help me buy a pack of electricity? "
Daisy said, "All right." Then she left. Benny smiled and said, "Ha! Ha! I finally played Daisy. She doesn't even know what electricity is. She put electricity in her bag like sugar! She looks really stupid. "
Mother said, "Do you know what electricity is?"
Benny said, "Of course. Electricity flows like wine. An instrument remembers the total value you use, and you have to pay every month. To some extent, it is like water. "
"That's a good explanation," dad said. "Although electricity is much more dangerous than water. Electricity is a good servant, but it is also a dangerous servant. You must be very careful when you use it. Can you tell me what it looks like? "
Benny, grab his head. Dad said, "No one can see electricity. It is invisible. But we can turn it into energy that we can see, hear and feel. Can you think of an example? "
Benny said, "Light. The light in the light bulb. "
Mother said, "That's right. Do you know where these points come from? "
Benny said, "well, it comes from our thin wire." They connected the thick wires under the road. "
"We call thick wires cables," said Dad. "Do you know where they connect?"
"A reservoir?" Benny said.
"No, you said water." Dad said. "They are connected to a power station. We generate electricity there. "
Daisy is back. Benny said politely, "Can I have my electric bag?" A smile appeared on his face.
"Yes, yes." Daisy said. "Here you are."
Benny said, "But they are batteries!"
Daisy said, "Yes!"
"But ... but ..." Benny faltered.
"Daisy is right." Dad said. "They are a package with electricity. There are chemicals in it that can generate electricity. "
Daisy said, "Don't you know, Benny?"
Mom said, "Benny, who looks stupid now?"