You are putting all children in one category. Cellphones are not a distraction to all, I use it for school purposes, as I am now. I am researching debates on this subject. In the class I am now we are literally doing nothing, so I took the advantage to work on another classes work. But, I do agree that a lot of students do get distracted by cellphones. As I said before you can not say all students are the same. Ps. Debating is part of my work I am doing.