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.

General admission will be free from Jan. 7-11, 14-18, 21-25, 28-31.

Geared toward children with special needs, especially kids who may have a hard time sitting still or focusing in big groups. Sensory Storytime is followed by a new playgroup with sensory activity stations for kids and caregivers to explore together. These free storytimes, best for ages 2 to 6, are offered on Tuesdays at 4 p.m. at the Main Library, 834 Lake St. No advanced registration is required. Sensory Storytimes include stories and songs as well as large and small movement activities. A picture schedule is used in the front of the room, and individual schedules, fidget toys, and bean bag lap weights are available. Caregivers are required to be in attendance. Sensory Storytimes are 20 to 30 minutes long, and the sensory activities will be open for 30 minutes after the storytime ends. For more information, email sharris@oppl.org. Storytimes and activities are open to the general public, not just Oak Park residents.

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."