I received it as a participation prize. Magic Whistle A mysterious whistle that lets you play melodies just with your mouth (Suzuki Musical Instrument Manufacturing) Of course, for playing melodies! Also as sound effects to liven up the atmosphere. For example, instead of whistling to cheer at a soccer game, you can cheer with a good sound using this. Also for training your sense of pitch in a brass band club For communication with pets (parrots) A mysterious whistle that changes pitch freely by changing the space in your mouth. You can play melodies with a whistling tone. You can easily make sounds as sound effects, or enjoy playing it with instruments like a guitar.