Another ring of muscles that we use constantly is the orbicularis ori. This circles the mouth and allows us to shape words, eat, express emotions etc. One emotion that we can express with our mouths is laughter. We can pull back our orbicularis ori using a muscle attached to that muscle and the zygomatic arch. This is called the zygomaticus.
Students can feel that muscle by indulging in a little risibility.
As mentioned in my previous activity students learn what they use. After this activity the teacher should use every opportunity to reinforce the lesson. Quizzes may be given in which actions are listed. The students are then asked to name the muscle or bone that allows that action to happen.