Pediatrician Thomas Boyce has treated children who seem to be completely unflappable and unfazed by their surroundings — as well as those who are extremely sensitive to their environments. Over the years, he began to liken these two types of children to two very different flowers: dandelions and orchids. He talks about his research and gives advice on how to parent "orchid children." Boyce's book is 'The Orchid and the Dandelion: Why Some Children Struggle and How All Can Thrive.' Also, book critic Maureen Corrigan reviews the true crime story 'Say Nothing' by Patrick Radden Keefe, which takes place during the Troubles in Northern Ireland.