How can we control the mobile usage of childrens?What are all the effects of usage of mobiles for them?

A. You can limit the usage settling a time that I can give it to your half an hour one timer one hour twice a day like half an hour each session so this is one year to go for it and the I’ll effect could be the lens Pead sometime stammering weak eyesight effecting the brain of the child to be lot of things for a child