For those of you who read my post about the spanking spoons and didn't believe they were actually musical instruments, here's the proof. The pair shown above is an example of the spoons historically associated with Irish music, although they are commonly used in many types of folk music. Modern versions are joined at the end of the handle. This may be more practical for playing, but it renders the spoons useless for spanking, so I prefer the traditional style.
The video below explains how to play them. It looks a lot like spanking to me.