Party horns are festive noisemakers often used during celebrations like birthdays, New Year's Eve, and other special events. They are typically made of colorful paper or plastic and feature a rolled-up design that produces a loud, cheerful sound when blown into. The sound is created by a small, flexible plastic reed inside the horn that vibrates as air passes through it. These fun accessories come in various shapes and sizes, often adorned with bright colors and patterns. Party horns are popular among both children and adults, adding an element of excitement and joy to gatherings. They are commonly found alongside other party supplies, such as balloons and streamers.