Go big with your party decorations using our Foil Blue and Green "Happy Birthday" Letter Balloon Banner Kit. This kit includes 13 foil letter balloons in assorted shades of blue and green, spelling out "Happy Birthday." To assemble, inflate the 14-inch foil balloons with air using the included straw. Then, slide the balloons onto the 14 feet of twine through the tabs at the top. Hang your completed banner behind a party table or as a photo booth backdrop at your birthday bash! Find more ways to celebrate a new age, and shop the rest of our affordable birthday party decorations.