Build a snowman out of biodegradable and natural items to win. Fill out an entry form at the main office.

With small solar lights to guide their way, hikers, skiers and snowshoers can traverse the 1.3-mile fitness trail at Old School Forest Preserve in Libertyville or the 1.65-mile hilly section of the Millennium Trail adjacent to the winter Sports Area at Lakewood Forest Preserve in Wauconda. Starting Sunday, Nov. 4, the trails and adjacent parking lots will remain open until 9 .m. daily until March 9.

Feature the black bear and its adaptations for survival in the forest. Crawl into the bear's den, compare your senses to that of the black bear, feel his fur, come face to face with a black bear mount and more.

Free general admission to the original galleries and discounted rates on admission to Wild Reef, Polar Play Zone and Oceanarium.

Music Institute of Chicago's annual concert features 100-plus voices of the Brother Chorale of the Apostolic Church of God, performing traditional and contemporary gospel and jazz arrangements.

Exhibit includes numerous artifacts, photographs and other documentary items that tell the story of Chicago's iconic candy makers, including Snickers, Lemonheads, Butterfingers and Cracker Jack.

Interactive learning centers include a barn slide, apple orchard and chicken coop. Maggie, a life-sized fiberglass milking cow sponsored by Golden Oaks Farm in Wauconda, will be the focus of the new exhibit. Maggie is over five feet tall and features a working udder that recirculates the water that children "milk."

Stories, craft projects and family fun while celebrating Tu B'Shevat, the birthday of trees. Registration is requested online, by email or by phone at (312) 444-2812.