The Science Behind the Emotions in Inside Out 2

One of the things that happens when people become teenagers is that their brain becomes more sophisticated, and it allows for self-conscious emotions. Before age 13, kids are concrete in their thinking. They can’t always see things from another perspective. Then around 13 or 14, the ability to picture oneself on the outside, to imagine different scenarios, arrives as a result of brain development.
— Read on kottke.org/24/07/the-science-behind-the-emotions-in-inside-out-2