At first glance this site is, admittedly, quite intimidating, and it's members just as much so. This forum has members who submit deaths and comment on the manner of death, circumstances surrounding, contributing factors,et cetera. It can be a lesson for children, and adults of all ages that every action of has consequences. I show it to my children just to make sure they understand that. Used constructively, that site can help to teach children how to be safe in a world that is most decidedly not. As long as they are kept out of "inappropriate" areas, then they may just learn something.
You wouldn't think that empathy and compassion would exist on a site like that but you'd be wrong. Most of the members are quite compassionate, and not the morbidly obsessed freaks they are purported to be. Give it a try.