Infants are not scared silly because when affected by external sounds, bright lights or certain events, it does not interfere with the development of brain cells or nerves, thus affecting intellectual development, and infants are in a sensitive period of neurological development, when the external environment changes will instead allow the development of brain and nerves to have a catalytic effect. If long-term in a variety of external environmental shock will lead to abnormal development of psychological or behavioral, not necessarily affect the intellectual development, so in the process of bringing up do not need to deliberately create excessive quiet environment or excessive change, to provide children with a warm environment and moderate external stimulation can be.