Personally, I think this idea is ridiculous. I mean, come on, why would you grandparent honestly want a Wii. Then they have to go through the hassle of connecting it to their tv and then figuring out what button to push to turn it on. It's fine and dandy if you'd invite your grandparent to play with you but besides that the whole idea just sounds a bit silly to me.
REYNOLDS, GRETCHEN. "Why Wii Fit is Best for Grandparents - NYTimes.com." Health and Wellness - Well Blog - NYTimes.com. N.p., n.d. Web. 2 Dec. 2010.