I wouldn't go to Shedd's on the fourth, unless you want to look at humans instead of fishes. We were there Memorial day weekend, got there at 10:00 am. The line was long, and it was a 1.5+ hour wait time until we got to the door. Luckily we had a stroller so we got to go in a different line which made it a little faster. When we got in, the place was packed. I was litterally looking at people and not the fish. If you went any other time though, would definitely recommend it. If you do go, I recommend buying tickets first on the web so you can skip the line altogether. Oh and one more thing, talked to some lady on the bus. And she also commented on the aquarium in KY being better than Shedd's. Going to check that place out when I am in the area.