There’s nothing all that charming about Nintendo’s latest gadget. It’s not as zany as a zapper or as sexy as a steering wheel. It doesn’t even tell you whether you’re losing weight. However, the game maker is hoping a small cube-shaped device called “Wii MotionPlus” will take the Wii’s motion-sensing controls to a new level of precision. It’s no secret the wrist-flicking Wii Remote’s lack of accuracy has long been the console’s clunky downfall. The Wii MotionPlus, available beginning June 8, successfully defeats that dilemma by using gyroscopic sensors.