Is the Smithsonian Castle haunted? Campers explore the real-life history of ghost spotting and ghostbusting through hands-on activities, visits to Smithsonian museums, and more. They learn the science behind so-called “sprit photography” and produce their own ghostly images; get stuck in the gooey chemistry of ectoplasm; compare the gargoyles of D.C. with those created by movie magic; and make their own movie-inspired ghostbusting tools. Family and friends are invited to witness a hauntingly exciting demonstration on Friday. Who knows what ghostly guests might materialize?