Let my brother tell me why he did it. If they are too young to talk, use conditioned reflex. When you love or bully your brother, you will be rewarded and punished. Don't hit the child, you can consider other ways, such as preparing a meal that your brother likes, but don't give it to him and don't tell him why. Of course, we should also look for the reasons from the perspective of our younger brother. For example, my brother did make a mistake first. If both children can talk normally, let them state the truth of the matter and the real reason for doing so, and solve it. To solve the problems between children, we must first integrate into them.
Someone said, "How can a child think of the meaning of survival?"
I can only say: what is instinct? Isn't it fun to play with other animals? But this is the meaning of evolution. Do you think a bear lying on the ground all day without playing can be strong? Therefore, the deep meaning of fighting is to prepare for survival, even if you don't realize it.
Therefore, we should also think that the struggle between our ancestors in the tribe is naturally driven by some surviving genes. Similarly, it is a farce for an elder brother to bully his younger brother. However, at different times, my brother's strength is far less than my brother's. In addition, it is generally insignificant for children to start working. They think fighting is like bullying in the eyes of their younger brothers and sisters. In the shallow sense, this kind of bullying is to get pleasure and psychological satisfaction, and in the deep sense, it is to hope that you will become stronger and stronger.
Of course, it is also possible that this brother likes pranks, and that is another matter. Well, the most tragic thing is that this brother doesn't like his younger brother, but that shouldn't protect his younger brother either.