Make each participant write down three interesting things about themselves. Once they have written down the information they should screw up the paper so that it looks like a snowball. Allow the participants to have a snowball fight for approximately 1 minute. Everyone has to pick up a snowball, open it up and guess whose information is on the paper. Once they have found the person, they have to stand in front of the classroom and tell everyone what they have learnt about their new friend.