But she still tried hard to recall everything she saw in the fairyland, and her clear big eyes sparkled with thought.
"Hmm...batteries," the little princess finally spoke again, gesturing gently in the air with her tiny hands. "It's actually not that difficult to make!"
"In the fairy world, I've seen popular science videos on making simple batteries. They're pretty easy to make!"
Upon hearing this, everyone looked at her with curiosity and anticipation on their faces.
They were all infected by the little princess's seriousness and confidence, and developed a strong interest in this mysterious and novel battery.
The little princess continued, "A battery has positive and negative electrodes, and it also needs a solution called an electrolyte."
She paused, as if trying to form her words. "In the immortal world, I saw them use copper and zinc sheets as positive and negative electrodes, put them in salt water or acid, and then make a battery."
"Positive and negative? Positive and negative!!!" At this point, the little princess suddenly exclaimed and clapped her hands, "Oh! No! Sizi forgot to connect the neutral wire!"
"Zero wire? What is the zero wire?" Everyone was startled by her sudden shout and looked at her in confusion.
The little princess hurried over to the simple generator, pointed at it with her little finger, and explained to everyone carefully:
"When I was in the Immortal Realm, Sizi saw that in order to ensure a stable flow of electricity, they would connect a wire called a 'neutral wire'."
At this point, the little princess suddenly patted her head in annoyance, "Oh, Sizi is so stupid, she actually forgot this important clue!"
Her little face was full of self-blame, but she quickly cheered up and said to herself:
"But, logically speaking, if this neutral wire is not connected, the light bulb should not light up! It's really strange, why can our light bulb still light up?"
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