At my school we do a variety of things during Math month. We have family math night, daily math problems, wear a number day, etc. I am trying to come up with a one day schoolwide activity that every student can participate in. For example, last year I told every student to come to school on a specific day wearing a tshirt with one of five colors. Then we made a schoolwide human bar graph. The kids loved it. This year I would like to do something similar that will get the kids just as excited. Any suggestions?