Officials planned special anti-drug lectures for kindergarteners after three 5-year-olds were found playing with a bag of cocaine at school.

One student apparently brought in the powder to Public School 153 in Harlem on Thursday, authorities said."Whether she found it or got it from somebody, we don't know," said Howard Lubkin, director of pupil personnel for school District 6.

"She showed it to her friends. The envelope was opened, some spilled on the desk, some on the floor," Lubkin said.

Tests at Columbia-Presbyterian Medical Center indicted the three children did not have any drugs in their systems.

Lubkin said the youngster who took the white powder to school said she found it in her home "but the stories changed several times."