Hi Niamh,
I think the Green Schools initiative is really effective way for children to learn about the effects of climate change and actively do something about it. The work done by GS committees the length and breath of the country is inspiring, educating children practically that they all can help address the problems with small steps in their lives. Working towards the second energy flag raises awareness of climate change and gets children thinking about reducing energy and more sustainable way of generating same. One suggestion I would have to run in tandem and complimentary to the GS work is Climate Detectives (Covered in detail on one of our other courses) from ESA. You can find out more about it at Climate detectives – Climate detectives (esa.int)