Her siblings are sometimes her teachers and sometimes her tormentors. It is a relationship with a person she has been drawn to, with whom she can explore, experiment learn about the world and make mistakes with. A friend is a person, like her, who is beginning from square one. Even though everyone was a child once, but as an adult it is difficult to slip into the shoes of a child once again. Parents and siblings can never take the place of friends of the same age and vice versa.
Every relationship has a unique place in life and performs a unique function.
Before two years of age, a child is too busy staring wide-eyed at the world around her, trying to take it all in. Her family fills her little world. While her immediate family stays a constant presence, all the time there are new faces and happenings to absorb. She is too young and immature to build a relationship with her peers. However, once she is two years old, she is ready to make her debut in society.