The Sept. 11, 2001, terrorist attacks in the United States had a deep impact on the Japanese children who were living there. Unlike adults, however, they have fewer ways of expressing their grief.

Masako Mori, a clinical psychologist who is a counselor at the Japan Education Center in Connecticut, is treating two children who lost their fathers in the New York attacks by using play therapy.

"Adults can talk to their close friends to relieve stress, discuss problems and find ways to resolve them. But children cannot because their cognitive and linguistic abilities are not fully developed," she said in a recent interview.