Hi, we will be visiting Chicago from Canada in July with 4 kids, age 8-13. We are flexible with dates if there's any good festivals or summer things going on. We are thinking of taking them to the Shedd Aquarium, Navy Pier, the Skydeck and maybe the Museum of Science. Any advice? other suggestions? We plan to stay somewhere around the Loop, or near Milenium Park. We are driving so have a car, but hope to use transit mostly.