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.

Museum is free Feb. 6, 13, 20, 27.

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.