This paper presents how a participatory approach was used to introduce to pupils aged 9-11 years at a school in the UK to a new subject - the environment. The session was started by finding out from the children what they already know about the subject, and what more they would like to find out about it. Using the children's understanding of the subject and the issue as a starting point, the children were introduced to what the World Summit and Agenda 21 were all about. The pupils were them divided into two groups and asked to demonstrate what their own local environment looks like, using mapping. Their maps were then explained and discussed. The paper notes that the pupils were able to show their local environmental issues.