Wii.
It's interactive - gets everyone up off the couch to play a game of tennis or bowl a few games.
My sister is a Play Station person - as she put it to me - ' why would I want exercise when I play a video game?'..and she can play her PS for hours upon hours. I like something simple and that's the Wii...it's good for any age and in fact, it's apparently found quite a niche in people over 45...they are now used in many elder residences and the people there love it! sammieswife.