I was going to log on today to ask a similar question. Our daughter, age 5, is suddenly quite worried about death. She understands death at this point. She is quite concerned that I will pass in the night. She will creep into our room in the middle of the night to check on me. She is very quiet, I only know it because I am a light sleeper. Each night before bed she asks about death and when we will die and how old we will be. We try to be both reassuring but honest. Interestingly, I can recall being afraid of my parents dying in the night when I was young. I used to wake them up to see if they were alive so perhaps this is an improvement?
And the broccoli comment cracked me up
