How about this for a way to keep little ones busy while you watch the game? Print onto card and punch holes around the edges for lacing up. Laminate if you want to use it again next year.
American Football Lacing Card
This nice and simple tennis ball lacing card will help even the youngest child improve their fine motor skills as they thread in and out.
There is something that appeals to children about sumo wrestlers and with a nice simple outline this lacing card will be a fun addition to a Japanese project.