The Good Childhood report 2017 finds that happiness among young people in the UK is at its lowest since 2010 The wellbeing and happiness of millions of children is being affected by concerns about crime in their local area, according to a study. The Good Childhood report 2017, based on a survey of 3,000 10-17 year olds and their parents, found that two in five teenagers in the UK worry about anti-social behaviour and other crimes.