Wrist coil features a durable, elastic construction that can be stretched and re-stretched while still returning to its original shape. Included whistle emits a loud, high-pitched sound to quickly grab the attention of people in crowds or during an event. Vibrant, tri-color coil provides a fun way to stay creative in the classroom. Wrist coil and whistle are perfect for use during exercise, outdoor activities, field trips and more.Wrist coil features a durable, elastic construction that can be stretched and re-stretched while still returning to its original shape. Included whistle emits a loud, high-pitched sound to quickly grab the attention of people in crowds or during an event. Vibrant, tri-color coil provides a fun way to stay creative in the classroom. Wrist coil and whistle are perfect for use during exercise, outdoor activities, field trips and more.