Scooby-dooby-doo! If your son or daughter loves Scooby-Doo, throw them a birthday party they'll never forget with a Scooby-Doo theme! Browse through our balloons to find just what you are looking for. Whether you go with the 31" Scooby-Doo Roo-Hoo Foil/Mylar Balloon or the 18" Scooby-Doo Rappy Rirthday Foil/Mylar Balloon, your child will get a kick out of these fun balloons!