Nintendo also says that children under six shouldn't use the 3D mode at all, since their eyes are still developing, and that parents can usecontrols built into the 3DS to lock it into 2D mode for children.
Along the way, Sony has managed to support competing 3D technologies, while adding a virtual reality-type experience to 3D games that also use PlayStation Move motion-sensor controls like MLB 11: The Show featuring Joe Mauer.