Pastry chef and Milk Bar founder Christina Tosi discusses how she got into baking as child, turning to Instagram Live during the coronavirus lockdown and using baked goods as a way to connect with people with "CBS This Morning" correspondent Vladimir Duthiers. In her fourth and latest cookbook, "Milk Bar: Kids Only," Tosi is hoping to inspire a new generation of young bakers. She believes "baked goods are invitations into people's lives." and "opportunities to share joy, heart and emotion."