Doragonn Head Origami. Follow along and fold your own. Cut a jaw out of a box and set the balloon in the box as the picture shows.
The neck should fold inwards so that the head folds slightly over the neck, creating a jaw. Instructions to learn how to make various kinds of 3d origami the origami dragon is based if you used a typical origami paper (15cm x 15cm) to fold the head. Glue one at the back of the head and the other onto the inner side of the last link.