Use them as place card holders. Write each guest's name on a balloon and then place it at their seat. For something different, inflate a balloon and place a small piece of paper with the guest's name inside. Then tie a ribbon around the neck of the balloon and place it at each setting.
Use them as part of a centerpiece. Balloons are a great way to add height and color to a centerpiece. Use a variety of sizes and colors to create a unique look.
Use them to create a balloon garland. Balloon garlands are a great way to add a festive touch to any table. They are also surprisingly easy to make. Simply inflate a variety of balloons and then thread them through a long piece of string or ribbon. Hang the garland from the ceiling or drape it along the table. You can also use a balloon pump to inflate the balloons instead of blowing them up by mouth.