Little kids' minds are very, very strong. They bend. There's a lot of tensile strength and they don't break. We start our kids off on things like "Hansel and Gretel," which features child abbandonment, kidnapping, attempted murder, forcible detention, cannibalism, and finally murder by cremation. And the kids love it.
Bare bones: conversations on terror with Stephen King (ed. McGraw-Hill Companies, 1988)