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."

Fun and healthful activities include free chair massages, manicures, cholesterol screenings, and children's arts and crafts.

Afternoon includes hands-on actvities, live science demonstrations and experiments for kids.

Evanston author Todd Hasak-Lowy discusses and signs copies of his funny and poignant new novel for young people, "33 Minutes." Refreshments will be served.