A second game is quite a bit of fun. In a circle again, I repeatedly call out "Heads Down" and "Heads Up", and students follow that direction. When heads snap up, they are to look someone in the eye (a different person each time). If the other person is looking back at you in the eye, you have to sit down. The field dwindles until only one or two players remain standing.
Finally, we simply like to exercise a quiet focus and tune out the rest of the room - other students, noises, itches, and wiggles. Students, still in a circle, find a point on the opposing wall to focus on for a full minute. Without smiling, giggling, or wiggling, they have to ignore everything that happens around them or in their peripheral vision. They aren't supposed to scratch, lean, or smile. Afterward, we have had some quick discussions about what makes this so hard and how to do better the next time.
We will continue these games, and add others, as the year passes. This group is pretty wiggly and talkative right now; with some concentrated effort, I am hopeful we can do something about that and start seeing improvement on this front.