We went to see the play South Pacific - it was great. We walked there (I love walking in downtown Chicago, just something magical about it!) We also started walking home but by then it was sleeting and we tried for about a half an hour to get a cab. We finally did and by the time we got to our room we were soaking wet.
We also visited the Shed Aquarium and the Adler Planetarium. (We used to have annual passes to the Shed when we lived in Iowa). Lots of fun.