All you southerner'sSnowball fights, Snow forts, making snow angels...I haven't done that in a long time
Ice Skating, Sledding. Hockey of any kind. I know of a couple places that offer big golfing deals in the wintertime. Oh yeah, Snow Scuplture, I've seen a giant chess set, a snow arch (built by the engineers at school, go figure). Horseback Ridding still counts, Sleigh rides (if you can find somebody who acutally does it).
Come on. all you need is a cheap plastic sled or an inner tube, snow, and a nice hill..sledding is so easy.