I use this game with a large number of students (75-80) for fun and aerobic activity.
Equipement: 4-6 soft stuffed animals
The students make a perimeter for the game by sitting in a circle.. Number the students from 1-5 (for larger classes you can go up to 8). This game is like dodgeball. After calling a number, the students with that number run to the middle and pick up a stuffed animal. They must throw the stuffed animals at each other and once hit a player must sit back down in the perimeter. When only two people are left in the game, you stop the game and declare these two the "survivors." They get to stay in the middle of the playing area and will be part of the next game. Call out the next number and repeat this process until everyone has gotten to play.
Dodgeball can get too aggresive, but with this game you find the students cheering for the "survivors." And the survivors sometimes are your most timid students.