I know there is a big theme park in Ohio, I've been to 6 flags and Michigan adventures but is there a big theme park closer to Michigan?
The only other good theme park I can think of in Ohio is cedar point but I'm not sure how close that it to Michigan. It shouldn't be a super long drive....... Maybe 3 hours depending on where in Michigan you are. Its located in Sandusky Ohio.
defiantly... Cedar point was always one of my favorites when i lived in Michigan