PBS
Pbs: Daniel Tiger's Neighborhood: Activity: Going Away and Coming Back
This activity from The Fred Rogers' Company uses imaginative play to help children express their feelings about when adults have to go away, and develop a sense of trust that grownups will come back.
Other
Separation Anxiety Disorder Information
A comprehensive look at Separation Anxiety Disorder, complete with a definition, a thorough description, causes and symptoms, diagnosis and treatment options, and prognosis. Also included is a list of resources at the bottom of the article.