Sweater Mitten Mania at Thacher Nature Center.  Turn your old sweater into a warm and woolly pair of mittens! These are great gifts for the holidays or perfect to keep your own hands nice and toasty.  Participants should bring an old sweater (wool if possible), fleece or an old t-shirt for mitten lining, scissors, thread, and sewing pins. Some sewing experience is helpful. 1 to 4 p.m. at 87 Stan Levine Dr, Voorheesville, 12186. Call 518-872-0800 to register.