Celebration of all things pizza features pie vendors, music, arts & crafts, a pizza eating contest and more

See gardens, woodlands, wetlands and prairies in a tram tour. 60-minute and 30-minute tours explain the rich Arboretum history, and describe the trees and plants you'll see. There's also an opportunity to see lovely wildlife in a native habitat.

The new Railway Garden, a G-gauge model railway running through a 2.5 acre site, opens April 30. Visitors enter through a 1920s-era railway depot to see trains running through a garden of miniature plants, water features and a variety of landscapes. May 1 through October.

Drop in anytime between 11 a.m. - 4 p.m. at the conservatory's Elizabeth Morse Genius Children's Garden to plant an imaginary garden, build a tropical habitat, help water the plants, or read a book under the tropical canopy. Runs through entire 2012.

An outdoor extravaganza held in partnership with the United Urban Network and the Calumet Stewardship Initiative that includes a variety of themed hikes and outdoor activity stations.

Walk along a winding trail and view gigantic animatronic bugs, plus more than 150 stationary insects, which will be part of six themed scenes. Guests can also see live creepy crawlies in Harry's Big Adventure: My Bug World! The interactive habitats feature several ecosystems to show how insects impact their surroundings, the environment, and human lives. Activities, including bug cooking demonstrations, cockroach races, a spider web climber, and other bug-themed entertainment is planned for guests throughout the summer.

Celebrate Philippine Independence Day and the 150th birthday of Jose Rizal, national hero of the Philippines by participating in a variety of arts and crafts, enjoying traditional treats and joining the "Parade of Costumes." Plus, live Filipino music and dancing.

Children can immerse themselves in backstage preparation, perform routines in center ring or manage the behind-the-scenes action of lights and sound. Plus, try making a circus balance toy or dress up like a clown.

The exhibition features selected "doodles" created by students from across the state.

Fun, learning adventure in gardening lets you explore the Wonder Works Organic Garden, examine all the different plants, inspect the different insects, remove unwanted growth and learn to use a variety of garden tools. Participating children may be able to take home a piece of freshly picked produce.

Take a behind-the-scenes glimpse at the world of magic and its historic roots in Chicago. Features a multimedia object theater experience, artifact display and live performances. Discover the tricks of the trade and witness Chicago's magical past reappear before your very eyes.

A private collection of late 17th and early 18th century French clothing and accessories. This display presents historical information on apparel, as well as the process and passion of building a collection.

From Fannie May to Brach's Candies, Tootsie Rolls, Frango Mints, Lemonheads and more, Chicago has a tasty history of making candy loved the world over. Learn about Chicago's sweet history and how candy and the City of Chicago grew up together. May 11-Sept. 18.

A special exhibit on the history of Girl Scouting, with special focus on Oak Park, River Forest, and Forest Park. Celebrate the 100th anniversary of the founding of the Girl Scouts of the USA.

Exhibit tells the story of Girl Scouting and Boy Scouting in America.

Visitors become space adventurers and set off on a journey to discover the Universe in a way never done before. Travel a billion light-years and back, fly through space, orbit the Moon, zoom into a canyon on Mars, and soar through the cosmic web where a million galaxies shower down. The experience was created utilizing real telescopic data and the best scientific imagery.

Exhibit examines the ancestry and evolution of numerous species, ranging from huge to tiny, from speedy to sloth-like, and displays animals with oversized claws, fangs, snouts, and horns. Highlights include taxidermy specimens, an entire skeleton of a giant hoofed plant-eater, a life-size model of the largest land mammal that ever lived, one of the oldest fossilized bats ever found, and an impressive diorama featuring the swamps and forests of an island in the Arctic. Runs May 26, 2012-Jan. 6, 2013.

Learn about the American bicycle and Chicago's bike culture. The exhibition details the roots of America's most democratic and sustainable form of transportation and considers why human-powered locomotion could be the way of the future for our rapidly evolving urban environment.

Visitors go on an interactive journey through the world of ancient Greece, where they can meet the gods, experience ancient Greek daily life and interact with the epic poem The Odyssey through more than 25 engaging interactive components, including climbing into a 13-foot tall Trojan Horse. Kids play and learn as they navigate rocky caves and open seas on "The Odyssey: A Hero's Journey" and e-mail home their Hero Record, belt tunes in the Sirens Karaoke Cave, discover which Greek god they are most like, match wits with Aristotle in a game of 20 questions, test their arm wrestling prowess in the Gymnasium and marvel at a working replica of the Antikythera Mechanism, believed to be the world's oldest computer.

Weekly program that introduces children to Modern Greek language through stories and songs. They will learn new words and phrases each week.

Girls make their own reading journal to take home, like the one McKenna has in her stories. Mondays and Wednesdays.

Team up with dad to make Cheddar Cheeseburger and Onion Sliders, Oven Roasted Seasoned Fries, a tossed salad with homemade dressing and some dessert.

Watch men painted blue do unusual performance art and original slapstick comedy. It's fun to sit in the front, but remember to wear a plastic poncho to avoid the flying food and liquids. Buy tickets at the box office, online, via Ticketmaster or by calling (773) 348-4000.

Family friendly show also offers breakfast buffet with Wizard of Oz characters on April 28, May 12, 19, 26 and June 16. Performances run April 25-June 16. Regular performances are at 10 a.m. Wednesday through Saturday starting on April 25 (excludes May 2, May 5, June 6, June 7, June 13, June 14). There will be two performances at 10 a.m. and 1 p.m. April 28, May 12, May 19, May 26 and June 16.

This is the beloved story of Peter, Wendy, Michael, John, Captain Hook, Smee, the lost boys, pirates and the Indians, and of course, Tinker Bell, in their adventures in Never Land. Performances are 1 p.m. Saturdays and 11 a.m. Sundays from May 26-June 17.