This is another part of the Aberystwyth show, that formed one of the other screens. It is an animation, printed onto perspex squares held by many people, that when run together make an animation. The squares were put in the gallery on long shelves and at end of show people could come and collect theirs. The soundtrack is part of the other other screen, which was a long pan of a choir singing a Welsh nursery rhyme.
https://www.youtube.com/watch?v=fuHmQSDZ_yY