i wouldn't bother with it again
it was pretty boring for me and my family. we had to walk thru a building, get checked, metal detected, then we had to walk across a yard on a hot sunny day in philly, my family ended up walking by all the artifacts and stuff, they were so excited to see the bell, and there it was. you couldn't even read it. i was pretty dissapointed. not a place to bring the kids, really.