Most kids will look past the weird animation and the the whole idea of the food chain, but what I saw in that episode was Pen's way of showing an idea of Incarnation as well as the circle of life. I love the fact that, without actually saying it bluntly, that episode brings on a whole new light to a religious topic, and a scientific one as well. The science of life, and the religious belief of reincarnation. The man is a bloody genius.