Based on the outfit of the little boy on the right (yes you may or may not know that little boys wore "dresses" until about age 3 back then) I think the photo was taken around 1893-1896. I have a photo of one of my ancestors from 1896 and he is wearing a little sailor-type outfit just like that. The photographer was LB Kline too. I wonder if Kline had a wardrobe room for his clients?
Nicole in PA.