Scooby-Doo Happy Birthday Balloon Set Scooby-Doo Happy Birthday Balloon Set Includes: (1) Supershape Scooby-Doo Shaped Mylar Balloons (2) 18" Scooby-Doo Happy Birthday Mylar balloons (2) 18" Purple Stars Mylar balloons (6) 11" Latex Balloons ~ Colors As Shown