Orange flames shoot out from two black-and-white skyscrapers. Airplanes outlined in black head for the buildings from opposing directions. The street below is filled with red cars, sirens on top. Stick figures fall from windows high up; others on the ground wave their arms desperately. A text balloon above their heads says: "Help!"

"The Twin Towers Are Standing," a display of children's crayon drawings of the Sept. 11 attack on the World Trade Center in New York, is showing at The Pink Cow in Harajuku till April 30. The exhibition showcases works done by children aged 6-12 at workshops run by the charity organization Artists Without Borders.

"As an artist, I know that art is important," says Hector Sierra, 38, the founder of AWB. "Especially for children who have lived through war and who have no other way to express themselves."