I would tell the parent that these outbursts are disruptive and upsetting to the other children .... At the very least they are beginning to think there is something wrong with being there ... And that he needs to say goodbye hug and kiss his child prior to coming in the door and then leave immediately. You will bring the child thru the gate . I would not try to console the child I would take her to the couch/corner/chair/quiet space and tell her to stay there till she has a smile on her face and she is ready to join in.... I would not give her any attention what so ever..... If you feel her lack if sleep is part of the problem put her right to bed so 30-45 mins