Impression of the event. I do not forget it is a constant reminder. Think good thoughts. To make people happy. Smiles and laughter. I was impressed by the events in their lives.
The impression is that I may not forget the things that remind me of feeling good at creating happy smiles and laughter. Events that impressed in my life is.
the impression that I could not forget it is an event that will be a reminder to think of good feeling that Happy smile and laughter in my life. The event is impressive.