Helium balloons are inflatable objects filled with helium, a lighter-than-air gas. When filled, they rise into the atmosphere because helium is less dense than the surrounding air. These balloons are often made from materials like latex or mylar and come in various shapes and sizes, making them popular for celebrations and events. The use of helium balloons is common at parties, weddings, and festivals. They can be decorated with colors, patterns, or messages, adding a festive touch. However, it's important to handle them responsibly, as releasing balloons into the environment can harm wildlife and contribute to pollution.