Football Brainteaser

With the Superbowl coming up next weekend, here's a fun little brain teaser you can use to stump your older kids (or husbands, coworkers or other adults!)

NOTE:  I used crayons and eraser with my son because that's what a mom with kids has on hand.  However, you can use just about anything to make your goal posts and "football". (especially considering I might have learned this trick years ago in a bar with drink stirrers and a crumpled cocktail napkin! ;)  )