Children in this suburb of New York will just have to suffer being unfashionable, at least during school hours, because the slap-bracelet has been banned at two elementary schools.

The low-budget bracelets, which come in wild patterns and neon colors and coil around a wrist after a well-placed slap against the skin, are not allowed at Colonial and Siwanoy schools because of the possibility of injury, their principal, Joseph Longobardi, said Tuesday.

The bracelets are nine-inch flexible metal slats, much like Venetian blind material, covered with bright colored fabric. If the fabric wears away, Mr. Longobardi said, a sharp edge could be exposed and cut hands and arms.

He banned the bracelets after hearing of injuries in the West Orchard Elementary School in Chappaqua, N.Y. Officials there said a pupil who had removed the cloth covering required three stitches in her hand after she was cut with an exposed bracelet edge.