Price per piece. Do not inflate the modeling balloons with helium. These balloons offer a variety of uses; entertain children at parties and try crafting different characters and animals. You can also create interesting and simple balloon decorations that you can make yourself. Modeling balloons are intended for air inflation only. For more information on inflation, please refer to the "Pumps and Accessories" section. With modeling balloons, you can create beautiful balloon decorations. More details can be found on the portal in the "Design Your Balloon Decoration" section, where you can experiment with different color combinations.