Why do we tell kids that a fairy will give them cash in exchange for their teeth? How should we talk to them about scary things in the world? And is Mike one of the greatest operatic tenors of all time?  SOURCES:Laura Wheatman Hill, journalist.George Lin, Ph.D. student in psychology at the University of Pennsylvania.Melinda Wenner Moyer, journalist and author.Luciano Pavarotti, Italian operatic tenor.Amy Stoeber, clinical psychologist.Jacqueline Woolley, professor of psychology at the University of Texas at Austin. RESOURCES:"Parenting by Lying," by Peipei Setoh, Petrina Hui Xian Low, Gail D. Heyman, and Kang Lee (Current Directions in Psychological Science, 2024)."Should You Always Tell Your Kids the Truth? It Depends," by Laura Wheatman Hill (CNN, 2021)."Parenting by Lying in Childhood Is Associated With Negative Developmental Outcomes in Adulthood," by Peipei Setoh, Siqi Zhao, Rachel Santos, Gail D. Heyman, and Kang Lee (Journal of Experimental Child Psychology, 2020)."The Santa Lie," by Melinda Wenner Moyer (2012). EXTRAS:"When Is It OK to Tell a Lie?" by No Stupid Questions (2021).How to Raise Kids Who Aren't A*******: Science-Based Strategies for Better Parenting — from Tots to Teens, by Melinda Wenner Moyer (2021).Life Is Beautiful, film (1997)."Love at the Five and Dime," song by Nanci Griffith (1986).The Hiding Place, by Corrie ten Boom (1971).