Curious to see if that would work for me. My main problem (as well as talking too fast), is that I tend to set my jaw too stiffly when talking, so I am not mov

Curious to see if that would work for me. My main problem (as well as talking too fast), is that I tend to set my jaw too stiffly when talking, so I am not moving my lower mandible too much. In fact, I actually tend to smile when talking, so my lips are stiff and my jaw is set, which makes enunciation harder. I would think that having a mouth full of pebbles would tend to make you not want to move your jaw too much, which kind of defeats what I am trying to correct?