I NEED A CREATIVE IDEA! (category: boston sports, specifically fenway park)?

As a guys point of view i would say get a big baseball and draw on that if you can and put the row he was sitting in and the one you were and sighn it togther you can draw all over it like a red sox theme and green and red but i would try to find a big base ball or make one out clay maybe.. Also may i sugest that...Tell him is just for memory because you thought you really hit it off and you will remember it so you thought of making something special.... its very nice of you....no girl has ever done that for me lol