You can play Bumper to Bumper. Start with a word, and the last letter of the word needs to be the first letter of the next word. You can make this a group activity, and get the students to do different things to say the next word. Examples of things the students can do to say another word: the first group to all sit on the ground, the first group to stand on one foot, the first group to touch their nose, etc...
This can really spark some competitiveness within the class. Also, in between rounds, the students were pretty good at quieting down quickly.