Musical Gossip
Line the students up and have the student in the back tap out a phrase of a rhythm (on a card) on the back of the student in front of them. The tapping keeps passing forward and the student at the front of the line writes the rhythm on the whiteboard. It is fun to see how close they are to the original rhythm. You can play this as a team game with four or five students on each team and the first team to correctly repeat the rhythm wins the game.