Decorate castle: To make 4 small turret towers which will be inserted in Wonder Mold cake more stable, cut plastic dowel rods in the following sizes: 3 in. for center tower, 2 1/4 and 1 1/2 in. for side towers and 3/4 in. for front tower. Stand towers upside down, attach cut dowel rod to base with melted candy; refrigerate until firm. Trace windows onto paper and cut out to make pattern. Roll out white fondant 1/8 in. thick, cut windows using patterns. Also, roll out fondant 1/8 in. thick and cut out windows for sides of door 1 x 1/2 in. wide. Cover 4 small and 4 medium towers with reserved copper fondant, securing with damp brush. Attach windows to towers and cake using damp brush. Outline windows with tip 5. Position door. Attach flowers to windows and around door with tip 3 dots of icing; pipe tip 349 leaves. Pipe shingles on Wonder Mold cake using buttercream icing and tip 12.