Think of this activity like basketball brackets.
After completing a tradition value scale, we play this game. First, students assign random numbers from 1-10 to the left side of the bracket. Next, the students fill in the boxes according the the corresponding number on the value scale. Next, we flip a coin deciding if the higher or lower value wins. Repeat until there is a value "champion" on each student's sheet.
I usually play this one up. The kids I do this with talk about it for the rest of the year!