Its definatly a hard thing to do, no matter what you believe. Our family practices the Christian belief, and in september of last year Drade's mom passed away of Pancreatic cancer. We lived with her and my father in law, so my children were very very very very close to her. My little girl has just now finally accepted shes in heaven, but because shes only 3 she cant grasp the permanance part. She keeps asking if shes coming back, and my son (4) is determined that hes gonna grow wings to go and visit her. Its very sad. One thing that has helped my family a lot is to create a situation that they can do themselves that will help them accept things. im assuming no one has passed away yet, but you can still get creative depending on your beliefs.
SUch as:
When their gramma passed on, I explained to them that she wasnt sick anymore. She had gone to live with Jesus. they knew who Jesus was, but didnt know that they couldnt go visit him. So we got balloons for every holiday (recently, on her birthday, JAn 29th, her "1st birthday with Jesus" we called it.) We put our names on each card with an address, added a message, and let them go. When asked why we chose balloons, i told the kids this way we could send the message to the stars where Gramma was and she could read them. The kids now understand that when you die you go "to the stars" and they often go out on the deck and talk to her. IT put things into perspective for them, and they understand it. One thing i can definatly say from experience -- if hes asking now, talk to him now, and create a situation for you both to do. Dont wait until someone passes, it makes it harder on him (depending on how close they are) because not only is he now hurting for them, but hes confused as to what happened to them too. Then after he knows a little about it, and something does happen, hes more prepared.
I hope that helps some.
And now, away with the sad topics! incomming MONKEY!!