It's hard to do the Peggy Notebaert Nature Museum in just one day—and with this family pass you won't have to. Good for free general admission for two adults and two children in the same household, this family membership gives you a whole year to explore the museum, from the butterfly haven to the natural history of Chicago. In addition, your membership here gets you free or half-price entry into an array of other museums, plus a variety of other benefits. You'll have family outings galore!