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.

Learn more about polar bears - and what can be done to help them. The zoo offers twice-daily Arctic activities at 11:30 a.m. and 1:00 p.m. Resident polar bear Anana will be in for some extra treats, and staff and volunteers will be giving away free passes to see To The Arctic 3Dat Navy Pier IMAX Theater.

Learn about Chicago's two World's Fairs though the experiences of three Elmhurst residents during the 1893 and 1933-34 fairs and explore rare artifacts.

Explore different stations while experiencing interactive fun. There will be time to play games and use the popular preschool fitness station where children test their strength and endurance on a treadmill, weight bench, cycle and elliptical machine. The snowball room will be back.

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."

Using the Association of Library Services to Children (ALSC) guide, Every Child Ready to Read, explore the five main skills children need to have before they reach kindergarten and how to foster those skills at home. Materials are provided.