Celebrate birthdays in vibrant style with our 16" Airfill Only Happy Birthday Joint Rainbow Kit Foil Balloons. These eye-catching balloons feature a beautiful gradient of colors, transitioning from green to blue, pink, and yellow. The balloons spell out "happy birthday" in a playful script font, adding a festive touch to any birthday celebration. Perfect for decorating party spaces, these foil balloons are designed for air filling only and will make your special day even more memorable.