I had two rabbits who both died earlier this year. My ds is 2.5 and always asks to see the bunnies, so I told him that the poor bunnies died and they're not there anymore... he then asked me the heart breaking question "what's died", which I fluffed the answer to... I tried to link it to The Lion King (his current fave film) and explain about the circle of life... but I don't think he understands it. How do you explain death to a two year old?