The children are now 3 years old. Winston finds out if popular adults are marked out at this early stage in life and if life's loners are already apparent.

Communication is at the heart of being human and learning to communicate effectively takes a lifetime to perfect. In this episode, Professor Robert Winston explores how we develop the art of speech and body language to make ourselves understood and to understand others.

Self-esteem is a key element of happiness and success and makes us feel good about ourselves. During our lifetimes, self-esteem can fluctuate, because it is not something we are born with, it is something we acquire.