I recently came across this bank of resources from the Sustainable Energy Authority of Ireland website. There are documents, posters, lesson plans, worksheets and videos available to help you introduce students to the idea of sustainable energy. Many of the resources are also available in Irish.
JellyCam is a great, free program for stop motion animation. It's available for Windows and Mac and is incredibly easy to use. It doesn't have the bells and whistles that come with the expensive programs out there but this just makes it better for use in primary education.
Students would find this program a breeze to use with minimal guidance or teaching. I recommend installing it on any school computers and your students can start using it for animation or storytelling. Credit goes to one of my students who told me about JellyCam after he used it to create a project this week.