Back when Transformers started, it was more aimed at young children to start with, its just that the brand has grown up and evolved over time, effectively transforming its self from just focused on kids to ranging kids to adults as the years have gone by, besides, who says Transformers can't have childish moments and light hearted moments, I don't see any rules for that, sure the basic idea for the story is about two warring factions of robots, but having light hearted moments can really uplift someone's spirts when they are feeling down, for example, for me, when I think about the character of Skybite, I tend to think of his singing and how comical it is, thus making me smile!