I know it's not always Occam's razor, but in this case I tend to be the party pooper. This was probably drawn by an adult and now they try to make it a story. There are amazing young artists out there, but this kind of detail, the boy either learned how to draw one or two specific pictures again and again or somebody has helped with this.

I might also be wrong and we've seen the next art child prodigy, but I doubt it.