Children and their friends: how do the "bolitas" form?

Most children, when they are young, share the same interests. However, as they grow up, they begin to really discover their tastes, hobbies and preferences. And this is when you have to pay attention to the children and their friends. It is normal for them to take with the children with whom you foster friendship, either because they told you something about them or because at a party or school meeting you clicked more with a certain group of mo…