Back of each box has a Childrens's guide to TV Football, extracted from the book Football Lingo by Zander Holander and Paul Zimmerman, illustrated by Jerry Schlamp. Boxes 1-8 give definitions for common football terms, #9 gives the titles of the onfield officials and their duties, #10-12 are guides to official hand signals. Individual boxes do come up for sale from time to time, but it is rare to see a complete set of 12. All boxes are empty have been flattened, and show only very minor shelf wear.