Ooh, that's a good idea! She does know some of his family history. I could play the ADD card, too. "He's at risk for ADD, and TV makes it worse." Then it won't imply they've done anything wrong with their own grandson.

Although the boy is almost three years old, and has the vocabulary and speech ability of a one year old. That's within the extreme range of "normal" development, and isn't necessarily due to all the TV, but still....