Whatever do you mean by "over-thinking"? XD

To me…

Human Scootaloo looks like she is in her pre/early teens. And while the "little pony" is completely mythical in its anatomy and aging process let's assume she's the same age. Cognitive capabilities in the show seems to be 8-13 not considering that most fiction over-verbalises dialogue by children.

The only part of this that might confuse a few people, including me, is the outfit human Scootaloo is wearing; it's rather revealing for a young teen or tween. Though i suppose that shouldn't mean anything on the internet.

Or we are over-thinking this.

Cool picture though.