It could be argued that socialising and learning to get along with others are life-long lessons. But children have to start somewhere. Shona Innes is a clinical psychologist and children's book author. She's taken her experiences with children in her clinic and translated them into picture books. She explains how her book, Friendship is like a seesaw, explores the give and take nature of friendship, and why we don't need to be too involved in what goes on in the playground.