A percussion instrument consisting of a mounted row of wooden bars graduated in length to sound a chromatic scale, played with two small mallets.

木琴一种打击乐器，由逐级加长的一排排镶嵌的木棒组成，并发出半音音阶，用两个小木槌敲击。

youdao

Two wooden blocks, as any toddler knows, work fine as a percussion instrument, and give any Neanderthal half a gourd and a bit of animal skin and you've got a proto-Ringo.

FORBES: TRACKING THE EVOLUTION OF TAKE-OUT TUNES