The Museum of Science and Industry and the Field Museum are both well-funded, so they better be held to a high standard :)

They also both host overnights - bring your sleeping bag and pajamas and spend the evening with tons of activities, sleeping among the exhibits, and a morning breakfast. Have done both with my kids :)

https://www.msichicago.org/explore/whats-here/events/science...

https://www.fieldmuseum.org/our-events/dozin-with-the-dinos