Relaxing effects from playing in the water and enjoying cool breezes were examined by measuring various body parameters for 31 elementary and junior high school students. The measurements were done for 10 indexes of the subjects. Positive effects were observed on measurement items relating to physical conditions (blood pressure and skin temperature), and items relating to a person's consciousness (STAI questionnaire). In items relating to a person's unconsciousness (brain waves and AMI), such effects were observed only at one of the measurement locations.