@所见所得, it's all scientific
When my child was about 3 years old, he was like a scaled-down version of "100,000 whys", I don't know if it was because the language could finally express clearly, I wanted to exercise my little mouth more, or because I was full of curiosity about the world. In short, she could ask any strange question, such as "Why are dad and mom different?" Why should I go to kindergarten? Why can cars go so fast? "And so on, many, many more. I try to answer all her questions, and if I don't know, I will look for books or look up the Internet.
I remember once, when she was playing with her grandfather, she noticed that her grandfather had white hair. It had to make me bow my head and rummage through my hair like lice, asking her what she was doing but refusing to say anything. In the end, he said it when he didn't find it: "Why is there white in my grandfather's hair, but not in my mother's hair?" "I smiled and told her that because we have a substance in our hair called [melanin], the more melanin, the darker the color of the hair. If there is less melanin, the hair will turn yellow or white. And grandpa is now old, in old age, the various functions of the body will gradually decline, the composition of pigment will be less and less, so the hair will gradually turn white! As if she understood, she nodded and left, and since then she has been out of control with all kinds of problems.
It's not uncommon for such things to happen a lot in our family. Once I took her to a friend's house, her family is also a girl, a year and a half older than my daughter, when the two played together, the question came up again, asked a series of questions, annoyed the child asked, and complained to her: If you ask questions again, I won't play with you, so it can be regarded as temporarily suppressing her various questions.
There are too many "100,000 whys" in life, what do you all know?