Thankyou, I'll stop nagging him about it, haha. I made it sound like that's all he does with her, but he also plays and reads to her.
No, there is not need to worry about damage caused from the computer. And, for such a brief time, it is not really a problem that he does this. However, perhaps he should consider learning to engage a child so young in a way that is appropriate for the child. It's never to early to learn, so to speak,