Depends on what you want to see! Ticket prices can be found here: https://tickets.msichicago.org/tickets
No matter what you go there for.. you have to pay an entry fee. General admission is $21 per adult and $18 over 2. Also, you have to choose the package/events/attractions and then purchase those tickets aa well. Keep in mind you can't just walk up to attractions either: You need to make a reservation for most. Get there early so you have the best chance of getting into some of the attractions you like! I don't know about how much money. You could pack your own lunch/ snacks and save money there. I am a mom with kids; I spent money by default 😑Hope this helps.
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