Looking for something to do this weekend? Why not help out our fellow Earth. Grand Central Terminal is hosting an all-weekend festival to celebrate and school us in easy ways to go green. With more than 60 environmental companies, non-profit organizations, and Earth Day New York sponsors, there will be plenty of product samples, Yoga lessons, and volunteer opportunities to satisfy all 8 million of us New Yorker’s. Still not sold? Experience the wall climb – on the side of a 36 foot, vegetable oil powered bus. We aren’t sure if the bus will be moving while we scale it, but we hope it will be.