Yes, the sounds of string instruments come from their strings. The strings may be plucked, as in a guitar or harp; bowed, as with a cello or a violin; or struck, as with a dulcimer. This creates a vibration that causes a unique sound. Guitar is the most popular instrument in this family followed up by the violin. Each instrument also comes in a variety of sizes, to fit the size of the student. All younger students should be measured by a music teacher or in a music store to determine the size that suits them. While the piano has a lot of strings, it is a percussion instrument because you strike the keys with your fingers