A series of books that help children understand how to be healthy - throughout their livesA series of books that help children understand how to be healthy - throughout their lives This book is a fantastic introduction to the tricky subject of sex for children aged 9 . In a straightforward way, it explores what sex is and what it's for, examines sexuality and identity, what healthy relationships are like and tackles modern-day issues that confront teenagers such as sexting and online pornography.Is is part of the series Healthy for Life, which gives factual information on a range of health issues so teens can get the information they need to be healthy. The books feature fun infographic style illustrations.