Dude, it's a video game. They will be do that anyway, WiiFit or Metroid. There is no benefit from having kids staying in the house playing WiiFit. It is more likely they will see WiiFit as exercise and further alienate themselves from doing outdoor activities. Just like the WoW people think they are socialising because they play with millions of others online. Get with the real world. Kids are fatter, you think keeping them at home playing a game that won't improve fitness for 30 minutes is going to improve that? They need to go out and play with friends for hours, playing soccer or football or basketball or whatever. Fun stuff that actually has a health benefit. WiiFit may have those games but it certainly does not have those attributes needed to play the sport, it doesn't improve skills in anyway.