Gu Mai smiled. "Thank you for praising me again, otherwise I'd just open it, I really can't guess what it is."

In this era, the gift for children is not a pencil eraser stationery box. Since it wasn't, she couldn't have guessed.

"Open it." He Beichen said.

Gu Mai divided five by two, then pulled out the red wrapper, opened it and turned out to be a beautiful little doll standing on a box.

Music box!

She thought about it immediately, but she didn't show it. "What is this? What a cute doll with a mirror underneath. ”

"This is a music box." He Beichen said.

"What is a music box?"

He Beichen was energetic, and soon there was a sound in the box, and the little doll was spinning around on the mirror and dancing.

"Wow...... This box actually has the sound of music, and the little doll can even dance. Gu Mai said in surprise.

"......" He Beichen curled the corners of his mouth.

"I like it so much, I've never seen this thing before......" Gu Mai was particularly surprised. Brother Beichen, where did you buy this thing? ”

"It was sold to me by a friend." I met a classmate from the capital in the college, and because the other party had no money, he took out this for money.

Others look very fresh and it's a fun thing, but no one wants to spend a lot of money on it.

When he saw the music box, he thought about giving it as a gift, so he bought it.

Gu Mai said very gratefully. "Thank you for such a lovely gift, it's the first time I've received a gift on my birthday!"

"You gave me a gift too, and it's the first time I've ever received a birthday present!" He Beichen said.

Gu Mai said. "But what I gave you is not as good as what you gave me!"

"I love it." He said.

……

'Knock knock...... Knock knock knock ......'

The music box kept ringing music, and the little people on the box kept turning.

Gu Siyu gathered around, staring at it without blinking. "It's strange that there is music in this wooden box, and this little girl can go around all the time, why is that?"

Gu Mai shook his head blankly. "I don't know."

Gu Siyu glanced at Gu Mai with disdain and said to He Beichen. "I wanted to ask Brother Beichen, but I didn't want to ask you!"

Gu Mai gave his younger brother a fierce look. "Do you look down on me? You look down on me, I won't show you! ”

As she spoke, she was about to close the music box.

Gu Siyu hurriedly stopped. "Sister, don't be so stingy, let me play a little longer."

Of course, Gu Mai is not too stingy, toys are for playing, and then everyone shares them together.

He Beichen explained to the children. "There's a device in this box, and when you turn it, these bumps touch another device, and this device is like our strings, and then you can make a musical sound, and the principle is very simple."

Gu Siyu nodded as if he didn't understand. "And what about this little girl, why can she dance all the time!"

Gu Mai said. "You're stupid, that's because there's a magnet down there, and it's controlled by a magnet."

"......" Gu Siyu didn't believe what his sister said, and continued to ask He Beichen. Is she right? ”

He Beichen touched the child's head. "Your sister is great, that's right."