Percy Jackson & The Olympians: The Lightening Thief (PG) Percy Jackson (Logan Lerman) lives in a grotty New York City walk-up with his mother Sally. Percy suffers both an oafish Homer Simpsonesque stepfather and the kind of rough inner-city school whose students break out in fist fights with startling frequency. When his demigod status is revealed, Percy’s mother is kidnapped and taken into the underworld by Hades, who has the mistaken idea that Percy has stolen lightening from the Gods. Percy hones his fighting skills at Camp Half Blood, which is presided over by the centaur Chiron (Pierce Brosnan) sporting a glossy Fabio mane and a body like Flicka. At Half Blood, Percy hooks up with the athletic demigod daughter of Athena, Annabeth (Alexandra Daddario) and the wise-cracking goat-legged satyr Grover (Brandon T. Jackson). In this Odyssey for the iPod age, the trio gambol across America in search of the magic pearls that will allow them to escape Hades once Percy’s mother is retrieved. In this adventure that occasionally feels like a video game, the trio battle nine-headed Hydras, Uma Thurman as a very Tallulah Bankhead Medusa, and other beasties. The Lightening Thief boasts a moderately derivative J.K. Rowling-set up of three Ron-Harry-Hermione-style friends using magic against their foes. And the Chris Columbus film verges sharply from details of the book. But if kids aren’t too disappointed by the alterations to their beloved book (and many of the giddy, wild-eyed Lightening acolytes at a recent screening didn’t seem to mind), 2010 may have its first tween-and-under hit.