The SMART Kids Act directs the Surgeon General to develop evidence-based recommendations for how much time children should spend using screens, with the goal of promoting healthy development. The recommendations must be tailored to six different age groups ranging from infants through 18-year-olds, and may also address whether certain types of screen content are less harmful than others. The Surgeon General must work with an independent entity that has no financial conflicts of interest to develop these guidelines. Within one year of the bill's enactment, the Surgeon General must publish the recommendations on the Health and Human Services website and submit them to Congress. The bill does not establish specific funding levels or create any regulations, instead simply requiring the federal government to provide parents and the public with guidance on healthy screen time practices for children.