Description Tongue bird whistle, created by placing the tip of your tongue against the roofs of your mouth and blowing air through the small gaps between your tongue and teeth. The tongue bird whistle is a unique and fun way to make bird sounds using only your mouth and tongue. Features - Color: Blue -Material:Metal - Size: 2.80X1.90X0.10cm/1.10X0.75X0.04in - Bird whistles are perfect for bird calling or entertainment supplies, suitable for teens, women and men. - These bird whistles are lightweight and portable, easy to carry around, you could take them anywhere you want. - Made of metal materials, the bird whistles are safe and reliable, easy to learn and practical to use. - Bird whistles are ideal to create funny and interesting noise, helpful to catch people's attention. - Tongue bird whistle enhance people's creativity and imagination, allow for fun and creative to use. Package list: 4 x tongue whistles