This study analyses vertically about honorific expression sides on 4 children who age group 31 months to 43 months. It has been specifying into grammar form and vocabulary form with listener-honorific, subject-honorific and object-honorific. Then we investigate it`s appearing time and situation which honorific context has been used. We have found ``Hasipsio-che`` and ``Haera-che``, which is formal style of listener-honorific expression and also ``Haeyo-che`` and ``Hae-che``, which is in-formal style from all participant children. In Honorific language ``Jeo`` of listener-honorific was founded. Children use honorific expression with two intentions; first one is for respecting the others in higher position and second one is for achieving his/her pragmatic purposes against oppenent. In subject-honorific expression, prefinal-ending ``-Si-`` was appeared in common usage of greeting and ``Ggeseo`` was not used frequently. In vocabulary forms, ``Geoisida``, ``Desida``, ``Jumusida``, and ``Dolagasida`` were also founded however they are not been used much. The object-honorific expression founded less than listener-honorific and subject-honorific and we assume that it`s development is also slower than others. In grammar forms of the object-honorific, proposition, ``Gge`` and vocabulary form, ``Derida`` was founded.