Day One: I made my usual 
Once the edges were set up a bit, I spooned a slightly thinner version of Glace Icing into the centers. Gently pushing the icing to the edge, the border acted as a dam that contained the icing and did not let it overflow onto the table.
I googled "hexagon images" and came up with several size choices for the shape. I cut it out, traced it on thin cardboard and had my desired pattern. The approx. 1 1/2-inch pattern was used to trace the hexagons on all of my cookies (with the thin tip of a sharp knife). I found it was really easy to mark the lines while the icing was still slightly soft. It would have been much easier to use a hexagon cookie cutter to create the same indentations, but I wasn't thinking far enough ahead to order one in time.
This was the messiest and most difficult part of the whole process. Messy, because my hands were blackened with the whole process but all rinsed away without a problem. Difficult, because you really must have a steady hand and you must be careful not to drip the black icing onto other parts of the cookie or onto other cookies.
I carefully edged every imprinted hexagon- as shown in the picture- and then let those edges set up until slightly hardened. The nice thing about this part is that if you get tired at any point during decorating, just slip the icing tub into a ziploc bag while you relax for a while.
I then used a clean painbrush to 'paint' on the remainder of the black icing onto the hexagons... starting with the center hexagon and then coloring in alternating hexagons on the edges.
Here's the finished cookie. Amazingly enough, I didn't screw up a single cookie. I was psychotically careful about the whole process. This recipe makes exactly fifteen 6-inch-diameter cookies. You can make them any size you want, but I really wanted enough room for the hexagons to 'pop' and I also wanted them to look as realistic as possible. Since I don't have a 6-inch-round cookie cutter, I used a tupperware bowl... just turned it upside down and used the top of it as a cutter.
Day Three: After the icing had a good 24 hours to harden completely, each cookie was packaged individually with little tags for the kid's names.
I brought a basket of my finished Soccer Treats to the team party. Note to self... lay all cookies flat next time (sadly, a couple of the cookies broke in half when they were standing upright in the basket... they had softened slightly since we're having unusually warm 85 degree weather at the moment).