Ohio Statehouse
Address
+1-(614)-221-4848
Admission: Free tours for individuals
This is the Ohio Capitol building, built in pre-Civil War time. It still houses the state legislature.
COSI
333 West Broad Street
+1-(614)-228-COSI
Admission: Members: Free, Adults: $6, Seniors & Students: $4, Children 5 and under: Free, Admission is free on Sundays. Additional admission fees may be required for special exhibitions.
Monday : Closed, Tuesday-Sunday : 10-17:30, Thursdays : 10-20:30. Closed on major holidays.
COSI is an amazing museum, where kids will want to stay forever because of the cool and interactive science and technology exhibits.
Columbus Museum of Art
Free on Sundays. Has a good restaurant.