One of the concepts out there is the idea of a "rage to master." This can be with many highly gifted or almost all prodigies or even some more typical kids. Some of us follow one topic for a whle until we feel done with it, then relax until another takes hold. I would guess you might have seen some of this before now. Like a Lego kit obsession or Harry Potter or something else that took hold for awhile outside of academics?