I created a large-format playing field based on the official field drawing, but without all the dimension lines.
It is designed to be about 1"=1' and is in Powerpoint and can be printed-out at Kinko's or any place with a wide-format inkjet printer.
The paper-based field is
HERE.
You can make scaled-down tetras and goals out of soda straws.
That same field is also an 11"x17" paper play field for "strategy planning" like drawing football plays. The small printable field (again, without all the dimension lines) is located
HERE
We've got ours taped to a table in the model shop for "game-playing"