MUSTANG, OK -- School administrators are sending a warning to parents about a new and dangerous fad. It's called I-Dosing, or digital drugs. Kids are downloading music and tones that supposedly alter brain waves. The Web sites claim users can experience everything from euphoria to sedation.

Mustang Superintendent Bonnie Lightfoot told parents, "Some students who listened to one of these MP3s exhibited the same physical effects as if they were under the influence of drugs or alcohol."

The Oklahoma Bureau of Narcotics is investigating after several parents' complaints.