Is age really important, because i have a 7 year old brother and i started teaching him, and isnt the younger the better because of the natural it can become, i mean try to learn a language at 4 years old and try learning it at 20 years old, to whom is it easier? i guess you know the anwser, the only thing that could be an issue is really the aproach on how to teach it. Also kids have a lot more imagination and are not that so restrected and can accept new things a lot easier then adults.
So my conclusion would be, once they know how to read, its appropriate, but if for any reason this isn't true please correct me because this is just a point of view.
Pablo
