Chicago Tribune’s Heidi Stevens and Psychologist Dr. John Duffy join Anna Davlantes to talk about a number of parenting questions, including the right age at which to buy your child a phone, and the right amount of screen time. Plus, parents want to know what this quickly growing TikTok app is that teens and younger are using. Check out Dr. Duffy’s WGN Radio podcast, “Better,” and his podcast with Heidi, “On Purpose.”