Because of the long incubation period of chicken pox, most patients present with very few symptoms. Often, once the virus takes hold, those infected still do not notice any signs and symptoms, or only a few. It is common, however, for children to experience some weakness, a mild fever, and tiredness. However, soon after this, the visible signs and symptoms of chicken pox will become more apparent, which is the rash on the skin that is classical of the disease.