The nyckelharpa (which means "key harp" in Swedish) is a musical instrument that looks like a violin but is actually a harp! It has strings like a harp, but is held like a violin and has its own unique sound. The sound is made when you pluck or pull the strings with two special bow-like sticks. The two sticks make the strings vibrate, which produces the sound. The strings of the nyckelharpa can also be tuned with small levers that let you change the sound.