Gigantic Million-Piece LEGO Boulder Actually Has Styrofoam CoreS

You know that gigantic LEGO Indiana Jones boulder? Turns out that only the outside is LEGO. The inside (based on this photo) is made of styrofoam. We suppose that it would be way too cost-prohibitive to build the entire boulder out of LEGO, but that doesn't make us any less disappointed. [Photo Credit - Thanks Mike!]