Welcome to your sister. I hope she might have an easier time of it here, among people who certainly understand what it is to be different. Perhaps there are people here who can help her with her powers.
Strangely enough, my son Philip arrived the night before last. When I last remember him, he was but 2 years old. He is now 9, but certainly my own son.
I'm not sure myself, about the phones. If there is a way, as Black says, to filter out the unsuitable content... perhaps, with close supervision, so I know what he is being exposed to and can guide and educate accordingly.