One dapper Bowl craft that is almost a must have for the event is a cake of some kind, decorated to seek like a football field. This is actually fairly simple, using food coloring to ice the cake in green icing (with whatever flavor cake and frosting you seize), and white gridlines dividing the field with goal posts at each ruin. If you really feel festive, you can exercise sprinkles or other décor to effect teams on the field.
Another elegant Bowl craft that can really get the day an even more hyped-up experience for the guests of your party is a makeshift goal post. You can consume cardboard or even the Styrofoam floaties that are venerable in a pool to invent it and pass out plush footballs to guests, allowing them to spike the ball when their team of choice scores.
The shipshape Bowl is extremely moving for most people anyway, but introducing some basic crafts to the celebration can add to festivities and heighten the interest of all of your game day guests.