Upcoming free days at MSI The Museum of Science and Industry (MSI), 5700 S. Lake Shore Dr., is offering free days for Illinois residents on select days this month and next month. Illinois residents receive free museum entry Sept. 19-22 and again Sept. 25-29. Next month, MSI will offer free days Oct. 2-5. MSI is open daily from 9:30 a.m. to 4 p.m.