Around age 4 or 5, DS seemed to get a lot out of a book called
I Found A Dead Bird.
Unfortunately, even in second grade, many of his school journal entries (what little he would write) contained at least one sentence about death, particularly killing. And sometimes he would even be the killer! GAAH, talk about creepy! Most of the time I tried to let it go without comment, thinking it was typical for boys his age & that he probably was doing it to impress his classmates, but DH was even more freaked out and kept telling him to "stop writing about killing all the time!"