I covered the whole thing in Mod Podge to make sure it would hold up to some abuse. The area for the totals at the bottom is covered with a thin strip of clear contact paper. That way we can write on it with a dry erase marker and erase later.
The numbers are made with some little circle tabs I had laying around. I added some rub on numbers to the front and a small circle magnet to the back of each one. If you have any more questions, feel free to pm me.