“As parents, teachers and caregivers, we all want to raise resilient kids — to develop their strength so they can overcome obstacles big and small. Resilience leads to better health, greater happiness and more success. The good news is that resilience isn’t a fixed personality trait; we’re not born with a set amount of it. Resilience is a muscle we can help kids build.” Sheryl Sandberg, writing in the New York Times, tells how she and her children coped with the death of their father.