This so happens to be an 8th grade team from Spirit Lake! Many high school teams do these posters. Usually the teams use this somewhat of a fundraiser, have area businesses sponsor a poster, which will more than enough pay for the poster and have some left over to be used else where for the team. So you are familiar with them for high school, but why not do one for your little league or travel teams. They are fun and a great souvenir for the year! Also individual posters could be done as well!
