We got our coaches a basketball and had every kids sign the ball and put their jersey numbers on it as well and it was a big hit, he and she loved it.
you can also go get a trophy that says something special and put with much love(team's name) and the date and year. that would be really nice.
Maybe amake a scrapbook with some pictures of everyone of the game itself and decorate it and give. that would be great as well.
Good luck.
Bizmom