This weekend’s “Star Wars” 3-D re-release is getting still another added dimension at the AMC Liberty Tree Mall multiplex in Danvers, as the theater is hosting an event screening with activities and giveaways. (The theater is one of just ten around the country being tapped to do the whole value-added bit.) The event runs this Saturday from 11 a.m. to 6 p.m., and includes character photo ops, Darth Maul face painting, LEGO displays, and demonstrations of the upcoming “Star Wars” game for Xbox Kinect. The theater will also be including a fighter pod toy with 3-D ticket purchases all weekend, and podracer-style 3-D glasses on Saturday. Be warned, though: the giveaway info includes the usual while-supplies-last disclaimer. Mention the freebies to the kids prematurely, and you might find yourself schlepping over to the food court McDonald’s for a Happy Meal.