The latest traveling exhibition to land at the Brooklyn Children's Museum couldn't have a better name: "Big Adventure" is packed with the kind of experiential challenges more often found at major sports facilities or, well, adventure parks. Kids can climb up Adventure Mountain, a six-foot rock wall; make their way through the Tunnels of Fun; scale the Crow's Nest for a better view; test the virtual Out on a Ledge, which makes you feel as if you're walking a narrow beam three stories high; and attempt to cross an alligator-infested river (okay, not really) in River Crossing: Bridge Out!, among many other physical interactive experiences. Ages 6 to 12.