Jin, who was waiting in the workshop on the first floor, rubbed his hands together.
"First, we'll make a prototype.
We made a spinning wheel and a base to support it, and made a decoration to hang it from.
Since the wheel cannot move as it is, we have made it a windmill type so that it can be powered by wind magic.
Elsa is in charge of the sound-producing magic. It is an application of the music box I made at the previous technology exposition.
"Well, let's see..."
After finishing the assembly, Jin hung the first prototype from the eaves of his workshop.
"Wow, honey, what's that?"
Hannah, who had just finished helping around the house, peeked out and asked curiously.
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"It's a toy to soothe babies. It's a prototype."
"Hmm. Sounds interesting.
"Well, let's see if we can get it to work."
Jin says the key word to start it up.
"<>"
The merry-go-round begins to turn slowly. At the same time, a whistling sound is heard.
"Hmmm, maybe it's spinning a little too fast..."
"The music seems a bit monotonous.
While Jin and Elsa are discussing the improvements, Hannah gazes at the merry-go-round with a twinkle in her eye.
"Wow, this is interesting! I bet the baby will love this!"
"I see. I'm glad to hear that."
Jin was relieved to hear Hannah's positive feedback.
"Okay, let's improve it.
He stopped the operation and started to improve it again.
"......Hanna, what kind of music do you think babies would like?"
Elsa thought that music was difficult, so she asked Hannah for advice.
"Well, I think a more bouncy sound would be better than whistling, wouldn't it?"
"Oh, I see."
Hannah pointed out the sound, and Jin remembered a little more.
"I remember there was a sound that sounded like a rattling sound. ...... I wonder what that sound was?"
"I think it was a bell that didn't reverberate."
"What?"
Hannah's opinion surprised Jin a little. He was a little surprised at Hannah's opinion, because she had come up with an idea that seemed quite appropriate, even though she did not know what it was.
"What? Because, don't you think the sound of the bell is similar to that of a bell made of wood?
"Oh, I see."
What Hannah is talking about is what we would call a on modern Earth. <, i.e., a cow, but it seems that bells attached to livestock in general are also called this.
By the way, bells for bulls are not called <> or <>.
The bells are made of metal and have a ringing sound, but as the material becomes softer, the sound becomes a clanging sound.
"Sure, that sound is like a plastic bell," he says.
Maybe we can make the hanging bell ring like a wind chime as it rotates, Jin thought.
"How about ......?"
He discussed this with Elsa,
"Maybe. ...... though in that case I would have no place to play.
Erza agreed, but looked a little disappointed.
"Then, make me that bell."
Jin sensed this and decided to ask Erza to make it.
"Yes!
Thanks to this, Erza seemed to be suddenly motivated.
"You guys are so close!"
Hannah, who was watching the two of them, said this with a bit of envy.
For the next two hours, Jin and the others continued working on the prototype of the merry-go-round.