My daughter was about 7 or 8 at the time and her grandmother (my mother) was visiting. She lives close, and my daughter knows what she does for a living (therapist). My daughter asks "Mimi, (thats what she calls her) how long did you go to school?" And my mother answers and goes through all the different courses and years she was in college. My daughter asks very seriously "so, you went to school for that long so you could ask people all day 'how are you feeling today?'" :)