Scooby Doo Birthday Cake, Scooby Doo Cake, 18th Birthday Cake, 4th Birthday, . Kit with frames for invitations, labels for snacks, souvenirs and pictures! Explore Hilary Cherskov’s board “Scooby Doo Birthday” on Pinterest. See more ideas about Ideas party, Scooby doo cake and Birthday party ideas. Explore Terri’s board “Scooby Doo Birthday Printables” on Pinterest.