There isn't one certain age your child can start using screens.
From a young age, children begin to absorb material from screens. For an infant or toddler, the "right" content might be a Skype call with a family member who lives far away, or engaging in a high-quality app to learn an age-appropriate skill. It is important to make sure that screen time is spent on an activity that suits their age. With that said, Ingrid feels that there is no "set age" where screen time becomes truly applicable or appropriate.