We started with learning the history of chocolate, saw the cacao plant in all its stages, then went to the demonstration phase. Our guide was fantastic; he calls himself El Chapo Guapo, and he is knowledgeable and funny. He showed us the stages the bean goes through in processing. We got to taste the fresh cacao plant, the dried cacao bean, then the roasted bean. There is audience participation in the grinding and mixing process. We got the chance to sample hot chocolate the way it was originally served (interesting...); and then the best part: we got to sample the final product, mixed with the flavors of your choosing, of which there were over a dozen. Of course there is a small gift shop, as well.
Sorry that I don't know how to post a link, but you can find the tour easily in the search engine of your choice. Their tagline is "the sweetest rainforest experience."