This is a very well known video. With Ed Catmulls book, Creativity Inc. being read, we ended up googling for some Pixar short films and ended up finding this video.
I shared this with the little one - the story is tragic to say the least, but for a small child, the full import of it does not hit home (and that is good for now). But something amazing happened. As we watched the video, the little one said, Appa, this is a very sad video - and all because of what happens at 2.20 in the video. At that point, the Kiwi sheds a tear - just a single tear and that is enough to connect the audience with all the emotion being conveyed.
For the rest of us - grown up, the whole story is poignant - but even if you do not understand everything - just that one moment establishes the connect.
That is the power of emotion!