There are a surprising amount good wineries around lake Erie, hitting all the islands, renting a condo or cabin on the lake, charter fishing, and rock and roll hall of fame.
Apperantly there is an Invention hall of fame in Akron? never been though. make mafia connections,......., and profit.
Columbus Museum of Art, the Wexner Center, short north gallery hop, ohio NFL teams game, MLB is all but over with. If you havent been to a clippers game in the new stadium that's a must. Planks on parsons is a must. Ohio Theatre shows, Columbus symphony, the thirsty ear for some jazz flute action. Ohio st v Univ of Mich hockey game is fun. Bench clearing brawls ensue as its the last game of the year. I think there is a girl roller derby somewhere in Columbus too. Whats that old fashon farm life on 23 south...the kid would like that. Circleville pumpkin festival. Ohio historical society i guess?
I know hocking hills was mentioned but find a babysitter for the weekend, rent an A frame in the near fall future and make sweet sweet love all night long. And i guess your wife could come too.
toledo....well, they have tony paco's and a good walleye run in the early spring. Good place to get cheap crack and buy houses for $1.