Dad, Miao, and Tua are decorating a birthday party for Guau - - two floor-to-ceiling columns of balloons framing the birthday cake in between! But halfway through building the columns, they run out of balloons! Oh, no! How can they make two unfinished columns of balloons look like beautiful, festive birthday party decorations? Miao gets an idea! They can take the two unfinished columns of balloons and join them to form one big, beautiful balloon arch that perfectly frames the birthday cake!