Looking to save a few bucks? Check-out the following free Chicago festivals, attractions and activities...

Adler Planetarium (No Free Days in April)
Shedd Aquarium (No Free Days in April)
The Field Museum (Free General Admission, April 11)
Museum of Science & Industry (No Free Days in April)
The Art Institute of Chicago (Free General Admission, Thursdays 5pm - 8pm)
Museum of Contemporary Art (Tuesdays)
Loyola University Museum of Art (Tuesdays)
Chicago Children's Museum at Navy Pier (Free General Admission, first Sunday of the month and Thursdays 5pm-8pm)
Charnley-Persky House (Wednesdays)
Chicago History Museum (Mondays)
Millennium Park (Always Free!)
Navy Pier (Always Free!)
Smith Museum of Stained Glass at Navy Pier (Always Free!)
Buckingham Fountain (Always Free!)
Lincoln Park Zoo (Always Free!)
Lincoln Park Conservatory (Always Free!)
Peggy Notebaert Nature Museum (Thursdays)
Chicago Cultural Center (Always Free!)