"Guess the Set" Icebreaker Game

Make all participants sit in a group and then select a referee. The referee then chooses a set of 3-4 children that have something familiar in common. For example, they are all wearing yellow socks, or they are all wearing braces, or all of their names begin with the letter “C.” The remaining people in the group then try and guess what they have in common and what makes them a set.