A button needing no needle and thread conceived by a Swedish sculptor won first prize Thursday at the 17th annual Geneva Inventions Fair.

The button has a small plastic screw and is "sewn" on merely by turning it through any material and then snapping off the point.Called the "Spearbut," the plastic button comes in all shapes, sizes and colors and was the idea of Gudmar Olovson, a Swedish sculptor, and developed by his son and a nephew.