As video game sales continue to be in decline — June saw $1.17 billion in total sales this year, compared to $1.7 billion last June — Nintendo is still holding on to its top position, in part due to the tremendous success of its MotionPlus add-on.

You might have used your Nintendo Wii balance board to play some Wii Fit, or maybe some Punch-Out! But how advanced have you gotten into the diagnostics of the board itself.