carousel and aging in something wicked

yes, the carousel make you younger! however, it represents a conflict between accepting your natural fate (that is, death and the natural progression of life) or becoming younger at the cost of becoming a circus freak. The circus is evil precisely because it is made up of people who have violated their fates and thus are condemned to an unnatural existence. bradbury is saying that we should be happy with where we are in life, and not try to change our circumstances.