After Super Nintendo you stopped paying attention, then.
Games on Nintendo systems run the gamut. To be honest, Playstation probably has the most educational titles.
Wii is awesome, no matter how old you are.
That, and you're kind of mishmashing demographics.
It'd be more like, 5-9 and 14-18 (well, in like, unlucky kids households, or like, retards, it's more like 14 and up).