Seventeen-year-old Kassandra Mantz lost her father, Lee, on Aug. 12, 2012.
Her little brother, Keegan Wyshosky, 7, lost his father, Pete, one year earlier on July 18, 2011.
Her friend, Olivia Agosti, 17, lost her mother, Jackie, on Jan. 16, 2011.
These children are just a few of the 1.5 million across the country who have had to learn to live again after losing a parent.
Now, one mother is hoping to shed some light on a very real issue that many people just don't understand. Children grieve, too.