I find it a little strange that all things with a screen are considered the work of the devil.
This is the world we live in, DS, TV, playstation, internet, all good, educational and harmless when used properly as part of a way of life.
Why does everyone assume they are bad, if I said my DS reads a lot, you would not presume he reads horror stories and porn.
So why does everyone assume that anything seen on a screen is of no value. There are many excellent educational games on the DS.
I have always allowed my DS to use a laptop, and consoles, he uses them in his down time, he has many other interests and plenty of exercise.
Now at the age of 10 he can write code and has amazing IT skills. I think DC's that are not allowed to experience the modern world are at a disadvantage.