There was a giant iceberg that you could touch! If you left your hand on it long enough, you would leave a little mark on it, although it was super cold and I was able to do it for just a little.
I thought the exhibit could have been done a bit better, but we got the combo ticket, $45 for both the Titanic and the Bodies exhibit and thought it was worth it. Unless you're a big fan of Titanic, I wouldn't go, it's nothing too special although you do get see a large part of the ship.