Many parents find it hard to make decisions about screen time for their kids because advice comes from different directions and often conflicts. In the field of child development, there are decades of theory and research that can be very helpful as a guide for screen and digital device use with young kids. These ideas can be a resource for parents to depend on when they are trying to figure out about any screen, app, or digital device their child might want to use. Those in the field of child development theory and research know a great deal about how children learn and develop and what they need in order to grow to their full potential. This report offers parents six core ideas that come from the field of child development that can be helpful in evaluating screen and technology use with young children. These ideas can be used, not as a rigid rulebook of "shoulds" and "should nots," but more as a guide to help make decisions and support kids in this tech-saturated world. Ten suggestions for putting the six core ideas to use conclude the report.