Each family got a color (which is what we did at our last reunion, so I kept them the same color), and then the numbers were brown (so we were all part of one big unit).
It was fun to figure out every one's number.
Something else that would have been fun (but we didn't have time because we were busy having too much fun) would be to play games and call out peoples numbers. You get the idea...
The kids loved their shirts and in a year or son, when they have grown out of them, we hope to make a family blanket by cutting the t-shirts up into squares.
Then I cut out the numbers to use as my pattern when I cut the material. (I used knit fabric) Then I counted up all my numbers that I would need to cut (ex: there were 12 one's to cut out). Then I cut them all out. THEN, I centered every one's number on the t-shirt with pins and sewed them on. I used thread the color of the t-shirt to help the number pop out even more. I have to say, they turned out super cute and I am so glad I did the work (lots of work), cause it was all worth it!