ABCNews -- Brooke and Keith Desserich of Cincinnati, Ohio, were told their daughter Elena had 135 days to live. She beat her diagnosis by 121 days. But during that time, as she fought the cruelest form of pediatric brain cancer, 5-year-old Elena left a powerful legacy. She began to hide little notes -- hidden in book shelves, CD cases, sock drawers -- for her family to find after she was gone. "The first time I found a note caught between books, I thought nothing of it," said Keith Desserich, 34, and an entrepreneur. "But then I started to find 20 to 30 notes, and wondered if there was something more to it. One -- 'I love you Mom and Dad' -- was packed in a bag of clothes put away for the winter." Soon, the family got calls from her grandparents,...