The Cincinnati Observatory calls itself the birthplace of American astronomy, and it is a historic landmark that has been operating since the 1800s. Also, if you have young children with a burgeoning interest in astronomy that you want to foster, then you should definitely take them to the Cincinnati Observatory Center. It is very family-friendly. They also host some fun specialty events, like a Pi Day party on March 14. They also host astronomy classes for amateurs which will keep everyone in the family interested and learning more about space. If your children really take to it, you can sign them up for an Astronomy Club or Summer Camp.