The mbira is made of little metal strips attached to a small wooden board. The longest strips sit in the center, with the strips become shorter as they fan out to each side. To play the mbira, the metal strips are plucked with the thumbs and forefingers. (The larger the strip, the lower the sound. The smaller the strip, the higher the sound.) Mbira songs usually have melodies that can be played by alternating the left thumb with the right thumb and forefinger. Generally, mbiras are played in groups of two or more. It's popular in Zimbabwe and other south African countries.