Just recently opened (July 2016), the Ark Encounter is jus 30 minutes south of Cincinnati and conveniently right off of I75. It's worth one trip to experience the actual size of Noah's Ark. - an would definitely be a fun experience for kids. We spent about two hours walking through the Ark and ate lunch at the restaurant. Full of fascinating Bible facts and rebuttal arguments to non-believers. The other fascinating exhibit was the display of early Torah and Bibles - my favorite was the 1651 Geneva Bible.
I highly recommend that any Cincinnati visitors find a way to invest a half a day at this exhibit..