if you have Super Nintendo, how about let him play the basic 2-D games first like Super Mario All Stars that has Super Mario 2 and 3 in it, Super Mario World, Mega Man X, or Wanderer From Ys III...
but of course, the Wii should have some of those games downloadable I think...since I haven\'t been playing any new games lately, I really don\'t know what new games to suggest.