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Rain Rain-Activated Tongue Drum, a unique percussion instrument with metal tongues cut into the body and designed to play itself when struck by raindrops. It is an experimental musical instrument that generates sound through environmental interaction. When raindrops fall on its surface, each droplet vibrates a tongue to produce a note, resulting in random, meditative melody tones. It produces sound through vibrations. This instrument is used for music therapy, environmental awareness, and psycho