Explain that this is a completely silent game with three rounds. The team with the most points at the end of the third round wins. On the other hand, if any member of a team speaks, grunts, or makes any other noise, the team is disqualified from that round.
Explain the participants will silently arrange themselves into a line, with respect to certain characteristics: Number of Siblings, Shoe size, and Birthday. If there is a tie (or they demand a fourth "go"), height.
Once each group is satisfied that they have their order correct, they all have to clap at exactly the same time to announce that they finished. The first team done wins three points, second team gets two, third team gets 1.