This is a great ice-breaker for a new class and can be used as a get-to-know-each other activity.
Give each of the children a card with things written on it like "somebody who owns a dog," "someone with brown eyes," "someone who can play the guitar," etc,. in various boxes. There's a good example of a people bingo card on page 6 here (as below):
The children then have to walk around the room and find a different person's name to write in each box.
I posted this as part of the linky party at Yearn To Learn. Head on over there for more team-building activities.