Buy 1-day fun pass ($5.00) and make a jhakkas tour of the Great Chicago City (fun pass is valid for 24 hrs in both bus & train). Places to see: Sears Tower, Millenium Park + Fountain, Chicago River (michigan ave), walk in maginificent mile (michigan ave), John Hankok Tower, dont forget to go to Navy Pier (29 no bus from state street to navy pier) at the evening and possibly friday -so that u can see fireworks at 9.00 PM, Shed Aquarium & Museum, Art Institute of Chicago (michigan ave), Devon  Market (desi bazaar)-have $8 lunch or &10 dinner buffet at indian restuarant.....! Note that all these places are near to each other, and mostly in michigan ave, iteself. (dont rent a car). HAVE FUN!!