You want to get fit?  You want your spouse to get fit? You want your kids to get fit? Try this fun way for the whole family to get in shape without even knowing they are exercising. Exerblast uses high-tech gaming technology to create a real-world obstacle course for a heart-pounding adventure. Groups work together, moving through stations with different activities and challenges, and each person has an iPod that tracks energy expended and awards points. Ages 5 and up. 100 Reade Street. Expires November 4, 2012. www.exerblast.com