What about the efficiency argument?

So now they're making cell phones for five year olds. Cutesy phones with restricted functionality and GPS tracking. Of course this sparks the traditional could we or should we debate among child development 'professionals' but what about the efficiency argument?

At least a child will be able to use their phone; and all of its features. Somewhat more efficient than letting someone have them who was born before 1965; but there is an efficiency leverage here. Not only will the littlies be able to operate their own phone but they will also be able to help Granny with hers. Truth be told some of them will even be able to help out poor old Dad.