To add height to the back of the tabletop, my friend Wendy used little plastic baskets from the dollar store turned upside down and covered them with a tablecloth. They not only added interest, but provided a resting spot for the cold drinks and bins of peanuts.
Speaking of peanuts, another mom created these graphics for our school "team."
I love the "ice cold" sign she made, too...
And, here's a simple centerpiece...fill a large glass vase or ice bucket with baseballs...you could substitute golf or tennis balls if you need a different theme. Or use the popcorn holder centerpiece!
And finally, here's a better view of the concession sign my friend Victoria made...I love the detail. It's on poster board, but it looks like a chalk board (even in real life).
That's it. I'm currently working on ideas for my son's graduation party...too bad he doesn't play baseball...