Dad and I took turns tightening the string so we could make good sounds. You have to strum the strings to make a sound. Each string makes a different sound. To make other sounds, you hold the strings down with your fingers and strum on the bottom of the strings. All four strings make different sounds and you make even more when you move your fingers. If you go fast you get a faster beat than you would if you went slow. And when you go slow you get a slow beat.