According to Leckman and colleague Joseph L. Woolston, Cohen's "ability to put children and adults at ease" was "just magical";[1] Leckman said of Cohen, "To be a good child psychiatrist, you have to be a child at heart, and Donald was always willing to be sort of down there on the floor with the kids."[1] But he was also known for engaging parents; according to the National Child Traumatic Stress Network: