Slide Whistle - Set of 8 Pink Party Whistles. - Color: Pink - Quantity: Set of 8 - Type: Party Whistle - By sliding the white handle at the bottom of the mouthpiece, you can produce the notes do-re-mi-fa-so-la-si-do. Whether you can play it well depends on you. - Can also be used as a call whistle. Thank you for viewing.