[video]
I was thinking the same thing. It makes an interesting game, but if it could be applied on a larger scale, there's all sorts of potential applications. [if Nunnally weren't already in the process of being treated, he'd be very invested in the game indeed]
It's not difficult -- it takes some time to put the doll together, since they're just blank frames until you customize them; and then a little time to master the knack of it. But after that it's just a simple entertaining mental exercise.