Maracas can also be made of wood or plastic; the sound they make depends on what they're made of. As with the piano, you make sound on the celesta by pressing down on a key with your finger, which lifts a hammer inside and strikes a metal bar. Have you played one of these? It looks similar to a cymbal and is also untuned, but is much larger and has a raised center. This package is the best of both worlds for any beginning drummer. A percussion instrument consisting of a small wooden hoop with metal disc inserts called jingles.