We made these snacks earlier in the year for the Superbowl and they were a big hit, so we just changed the jersey color and the numbers.
I started by making a double batch of Rice Krispie treats. I pressed them into a greased sheet cake pan. Then I cut them into 25 treats. I spread on white melted chocolate to represent the jersey. Then I wrote on an Old English D and the number of all the players on the active roster. I put a little bit of melted chocolate on the back of a vanilla wafer and attached it to the top of each treat. Using a food marker, I drew on a face. (Because of lack of time, I didn't add all the features to the shirt that I could have, but the kids still liked them!)