This document is part of a toolkit written for and by HIV trainers. It has been designed to help trainers plan and organise educational sessions with community leaders or organised groups. The toolkit consists in a collection of participatory training exercises to help people at all levels understand stigma - what it means, why it is an important issue, what its root causes are - and develop strategies to challenge stigma and discrimination. The present document contains the Module I: "Children and stigma". This module aims to help explore and understand the different ways in which children are stigmatised, and to look at strategies to change attitudes and experiences. It is divided into two sections: exercises for children and exercises for adults.