The phrase "yellow balloons" refers to a group or collection of balloons that are all yellow in color. Balloons, typically made of rubber or latex, come in various colors and shapes, with yellow being one of them. Yellow is often associated with happiness, optimism, and warmth - feelings that can be conveyed through the use of yellow balloons for celebrations such as birthdays, baby showers, graduation parties, and other joyful events. In addition to their decorative purpose, yellow balloons may also serve a practical function by adding lightness or buoyancy in party games like volleyball or balloon tennis.