Following the idea of using maximum of reuse parts for this project, a sardine can has been used for the housing.
The can has been softly hammered with wooden dowel and the painted and vernished to give it a cow aspect as far as possible (look at that beautiful nose !)
Holes has been drilled to pass the cow head wire frame and the hook cable.
The whole circuit has been soldered on a prototype board which fit nicely in the housing.
The vibrating motor has been mounted on the hook and covered with hot glue.
I have to admit it has been a bit of work, but what a nice christmass gift !