Imagine sitting in a doctor's office, your sick five-year-old child or grandchild is wiggling in the chair beside you. The doctor says, "I'm sorry to inform you, but the only cure for this little heart is six months of total bed rest, no getting up for toys or the toilet." Your first thought flashes: 'Is she going to die? How on earth can I keep a five-year-old that quiet?' 'How sick is sick?' And then, the lighter questions; 'Can he run...