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Build each day around one anchor. Shedd Aquarium, the Field Museum and Griffin Museum of Science and Industry can each occupy several hours, so combining all three creates fatigue rather than variety. Add an outdoor counterpoint such as Crown Fountain, Maggie Daley Park, Lincoln Park Zoo or a short lakefront walk, adjusting for wind and temperature. Navy Pier works when a particular ride, performance or cruise appeals; its length and crowds make it a poor shortcut. Use trains for longer transfers, but remember that stations may involve stairs and that buses can be useful along the lakefront. Carry a simple weather layer and identify a nearby indoor fallback. Timed tickets reduce uncertainty at popular institutions. Most importantly, schedule food and rest before children need them. Chicago rewards families who choose fewer places and let an interactive gallery, animal habitat or fountain hold attention longer than expected.