Rulers

全員が同じYシャツを着用する。チームに分かれてそれぞれ秘密のルールを考え、Yシャツを作り替える。チームごとで「着る意味」が異なれば、同じものでも違うものになる。

All participants put on the same type of shirt. After dividing into teams, the members of each group think up their own rules and keep them secret from the other teams, and then make changes to their shirts. The same shirts become something different, because of the different reasons for wearing them.