>>6
there is already chimpanzee 'culture', where in certain groups of chimps they will use wood tools for the same purpose that 'tribes' of chimps not too far away use stone. not only that, but they teach their offspring to use the wood tools exclusively in one group, maybe because the dominant chimp is superstitious or conditioned to somehow, but that the offspring who learn it from the dominant chimp uses it without knowing exactly why, and passing that to their own offspring, it becomes more.
you know, there is a great degree of similarity between human brains and those of other animals, i would not at all be surprised if they had moments of imaginative thoughts, if not more.