Growing up too fast!

Looking for a little advice. Lately the subject of death and dying has come up with Harrison a few times. First around Easter when he learned about Jesus being resurrected in nursery and how "he died and then didn't die" and how the stone was gone when Mary came to find him (amazed at how much Harrison picks up from lessons--BLESS those awesome nursery leaders!). Then we went to Arlington cemetary a week and a half ago and he started asking lots questions about the soldiers buried there and how they died. Totally not prepared for that one. It's come up other times since with just random mentions of dying and how he doesn't want to die, etc. I've tried to explain as simply as possible that we die when we are really old and that when our bodies die our spirits are still around and that because of Jesus we can all be resurrected and live forever, etc. but I could probably do better and I know he's not quite getting it ("Jesus died, and then didn't die, and then died again!" or "the soldiers died and are under the grass and are really really little..."). Harrison seems to retain everything I say so when it comes back again I see his very literal view of my explanation and the inherent inaccuracies....Cory teaches 4/5 year olds in primary and is big on telling the truth to the extent possible and practical...so....how do you address death with a 3 year old? SO not ready for my baby to deal with real life topics! Can we just wait a little longer??