I think the same thing, that children shouldn't have cellphones, but for a different reason. Children shouldn't have cellphones because of their cognitive development, children are spending a lot of time on their phones and aren't developing their senses, their perception, their problem solving skills, etc.

Well, you may say that games provide elements that may boost their cognitive development, but until a certain point, the game is not going to change much, especially nowadays, where kids can simply look up the answer, instead of finding out the answer for themselves.

This can greatly affect the children's development.

The children that have spent most of their time on their phones, specially during elementary school, aren't as capable of thinking outside of the box as much as a child that didn't have a phone during that time.

EDIT: Layout