The Wii is a video game and entertainment console developed by Nintendo. It was released for sale in 2006, and primarily competes with Microsoft's Xbox 360 and Sony's PlayStation 3. In 2011, it had still sold more units worldwide than either of these other gaming consoles.
The Wii introduced a motion sensor bar, coupled with a special controller known as the Wii Remote, to allow players to control the cursor on the screen, as well as game actions, through the motion of their hands rather than through a directional pad on a traditional controller. It also introduced the Balance Board, which allowed a new dimension of physical-centered play, starting with Wii Fit.