A melodica is a small, portable musical instrument that combines elements of a keyboard and a wind instrument. It has a keyboard similar to that of a piano, and players blow air through a mouthpiece to produce sound. The melodica is often used in various music genres, including jazz, reggae, and classical. Typically made of plastic, the melodica is lightweight and easy to carry, making it popular for both beginners and experienced musicians. It usually has 32 to 37 keys, allowing for a range of notes. The instrument is also known for its unique, expressive sound, which can be enhanced with different playing techniques.