What is a whistle bead?

A whistle bead is a small, often hollow bead that produces a sound when air is blown through it. Typically made from materials like wood, plastic, or metal, whistle beads can be used in jewelry or as decorative elements in crafts. They are sometimes used in Musical Instruments or as functional items in outdoor gear, such as survival kits. The design allows for easy sound production, making them popular in various applications.