Two weeks in advance: Make bubble sticks. You will need 28 for 10 in. cake, 40 for 14 in. cake, 54 for 18 in. cake. Cut lollipop sticks in various lengths no shorter than 10 in.; leave some full-length sticks. Roll approximately 885 fondant balls, 1/2 to 3/4 in. diameter. Insert 7 to 8 balls on each stick, leaving 4 in. extended. Attach with thinned fondant adhesive. Let dry 2-4 hours. Brush balls with thin coat of Piping Gel and cover with Sparkling Sugar. Let dry.