In this sequel to the popular 2006 special-effects extravaganza, the ancient Egyptian tablet (the one that brings all the exhibits at New York's Museum of Natural History to life at night) is being shipped off to the Smithsonian in Washington, D.C. Naturally, former museum guard Larry Daley heads down to rescue it (and, by extension, keep his magical museum friends alive). He ends up fighting with a nasty pharaoh who talks like Boris Karloff  and falling in love with Amelia Earhart.  All the old gang are along for the ride, including Dexter the monkey.  Rated PG.