I wouldn't show Transformers Prime to a young kid. They got away with a lot because "they're just robots, wheee!" And it's true that there weren't any human body parts or blood because "just robots." But Bulkhead ripping the robo-guts out of a sentient Decepticon soldier was still disturbing. Or the episode where Spoiler Bulkhead brutally beats "Starscream" to death. Later in the episode we find out it was 'just' a clone of Starscream, but still . . . I like the show, but it was Y-7 for a reason. If we're talking about G1 Transformers (Sunbow) then that was pretty much all ages. Yeah, there was war and conflict, but there's always a sense of "everything will be okay." Except for the 1986 movie of course. I don't think most kids are very disturbed by violence if they can't see people being impacted. Like in Star Wars it's sad and terrible when Alderaan is blown up by the Death Star. But the human mind can't really conceive the enormity of the loss. It would be much more traumatizing to watch Luke, a single character we empathize with, get gunned down.