Features interactive activities, arts and crafts and games for kids. Plus, every day includes Wiggleworms at 10 a.m., when instructors from the Old Town School of Folk Music lead young children in a fun-filled sing-along and a reading circle at 11 a.m.

Observe majestic birds of prey up close and learn about their habitat, adaptations and the challenges that they face in an urban environment.

The exhibit, organized by the Purdue Agriculture Exhibit Design Center, teaches children that mammals are carnivores, herbivores or omnivores and that there are different types of teeth and feeding habits for each. Among its features are animal skulls, including a tiny weasel and a polar bear. Kids can look at their own teeth in the Tooth Sleuth mirror to determine their eating category.

Illinois residents enjoy free general admission and discounted rates for Wild Reef, Polar Play Zone and Abbott Oceanarium.

Summer concert series offering free live classical music performances every Tuesday at 5:45 p.m. in downtown Chicago (pre-concert reception at 5:15 p.m.). weekly classical music concerts featuring Chicago's best musicians.  Each concert is preceded by a free food and beverage reception with the artists in the Cathedral foyer. Concerts take place in the St. James Cathedral just steps from North Michigan Avenue. For more information call (312) 640-7418 or visit www.rushhour.org. Runs June 4-Aug. 27.

Stroll along the path and read the story of "Duck on a Bike" by David Shannon.

Celebrate Mo Willem's Elephant and Piggie seriesw with stories, crafts, and snacks.