Caldas is a close-knit community.
The children know what's happening in relatives/friends/and their own household
Children go to school/seminars and learn things.
Let's give these children a voice, by facilitating their call to a relative/friend immediately after they learn a lesson
Schoolchildren can be taken to dedicated seminars where they are taught all the things they need to learn about health and asbestos.
Each of them is given a cellphone for that day and a choice to call as many friends/relatives that they have, who they know have this problem and tell them about what they have learnt.
When a schoolkid you know and adore calls you and tells you something, you listen :)