Rigorous scientific knowledge is also very important for children, in the process of children's growth, scientific knowledge is equivalent to a correct three-view worldview, can lead children to correctly understand this world full of strange things.

Ye Xuan is going to give his baby daughters what is a "light year", light year is a distance unit, not a time unit.

This scientific knowledge is usually misinterpreted by many children who come into contact with it for the first time, because light years and light years, children focus on the word "year", so it is natural to think that this is a unit of time.

In fact, a light year is a long distance unit, which is the distance reached by the speed of light in a year, and the speed of light in a second is 300,000 kilometers.

Ye Xuan explained in detail to the baby daughters what is called light year.

The three little guys, Sissi, Xiaoxin and Yuzu, listened very attentively, because in their opinion, light year is a very new thing, and according to what Dad said, light year is a long, long distance.

The little ones don't have a general idea of the detailed distance data, but they already have a concept in their minds, that is, light years are really far away, and people can't go that far in a lifetime!

"Dad, what's the speed of light? Is the speed of light fast? Is it faster than a train? faster than an airplane and a rocket?" asked Yuzu curiously.

Hearing the baby daughter Yuzu ask such a question, from the perspective of Ye Xuan, an adult, I will think this question is very funny, after all, how can the speed of light be comparable to that of a train, an airplane, and a rocket?

But this question was asked by the baby daughter Yuzu, a child can be full of this curiosity, can associate so many things, it is already very good, now Yuzu only needs a correct guidance from Ye Xuan.

"Yuzu big fool, the speed of light is 300,000 kilometers per second, trains, planes and rockets, where can it be so fast?" At this time, before Ye Xuan could explain, her baby daughter Sissi had already begun to show her talent and knowledge.

Seeing this, Ye Xuan nodded with satisfaction, worthy of his smartest baby daughter Sissi, who even knew the knowledge that the speed of light is 300,000 kilometers per second.

Han Yuyun also looked at her baby daughter Qian Qian in surprise, Qian Qian is really smart, which proves that Ye Xuan usually educates her baby daughters very well.

"Wow!"

Yuzu's mouth opened wide in surprise, 300,000 kilometers per second, what kind of speed was that?

"How much does Qian Qian know?" Han Yuyun leaned into Ye Xuan's ear and whispered.

During this time, Han Yuyun was obsessed with her world tour, and she didn't know much about her baby daughter Qianqian's knowledge, not to mention that Qianqian also followed Ye Xuan before, Han Yuyun only knew that Qianqian was very smart, but for the question of what is the speed of light, Qianqian knew it, and Han Yuyun said that she was very surprised.

"Of course, our Sissi can be said to be the smartest among the children of her age. Ye Xuan said proudly: "Even if you go to participate in the strongest brain, it is estimated that you will not lose to those high school students." ”

Ye Xuan said this to show that the cleverness of his baby daughter Sissi is very strong, but in fact, it is still a bit exaggerated, after all, high school students at the level of academic tyrants, the amount of knowledge reserves is very rich, and it is estimated that the baby daughter Sissi is not yet able to reach that level.

However, Ye Xuan believes that as long as it takes a few more years, Sissi will definitely be able to reach that height, at that time, Sissi was only about ten years old at most, and her baby daughter was so good.

The family happily chatted on the lawn in the courtyard in front of the villa, chatting about various topics, looking at the stars in the sky, and talking about the future dreams of their baby daughters.

Ye Xuan will never forget the dreams of her baby daughters, especially her baby daughter Yuzu, she wants to become an astronaut, she is now working towards that great dream, and Yuzu is now mastering more and more knowledge about astronomy.

As for the baby daughter Sissi who wants to become a singer like her mother, she is already half of the success, because Sissi has already become the champion of the national children's singing competition, and the children's singer is Sissi, but Ye Xuan did not let her baby daughter Sissi accept various interviews in order to keep her baby daughter Sissi from being influenced by the outside world.

After all, the baby daughter Sissi is still young, and it is not good to be exposed to the impetuous world too early, as long as Sissi wins the championship of the National Children's Singing Competition, Sissi is happy, Ye Xuan and his wife Han Yuyun are also satisfied.

When Qianqian grows up in the future, if she still wants to continue her dream of being a singer, then Ye Xuan will naturally spare no effort to help her baby daughter Qianqian achieve her dreams like helping his wife Han Yuyun now.

Minutes and seconds ticked by.

In the blink of an eye, it's almost time for the baby girls to go to bed and rest.

"Baby, it's time for us to go back to sleep. Ye Xuan said to the baby daughters with a smile.

The three little ones nodded, although they were not very sleepy now, but going to bed on time was a habit that Ye Xuan asked his baby daughters to develop.

"Good!"

Sissi, Xiaoxin and Yuzu are also very well-behaved, Dad said that he was going to sleep, and the three little guys naturally said yes in unison.

Ye Xuan and his wife Han Yuyun led the three baby daughters of Sissi, Xiaoxin and Yuzu back to the villa, took them to wash up or something, and then changed into the cute pajamas of the three little ones, and let the baby daughters lie on the bed.

"Do Baba and Ma Ma want to sleep together?" asked Sissi, blinking her eyes wide, to Baba and her mother.

Ye Xuan and his wife Han Yuyun glanced at each other, the sleeping time of the baby daughters must be earlier than the sleeping time of the adults.

Now Ye Xuan and his wife Han Yuyun don't plan to sleep, and the two of them usually have to talk about some important topics before going to bed, that is, some private conversations and the like.

Ye Xuan saw the key information from his wife Han Yuyun's eyes, so he smiled and said to his baby daughter Qianqian: "Baby, dad and mom will go to bed after a while." ”

"Wow. ”

Sissi nodded.

However, Ye Xuan saw that the three little guys, Sissi, Xiaoxin and Yuzu, were wrapped in the quilt, but their eyes were wide open and they didn't sleep.