Seems to me like you're (somewhat) comparing apples to oranges.

I confess I don't really know much about Carillon Park, but a quick check on the web leads me to believe this is much more of a traditional museum sort of venue (not that that is bad). On the other hand, when I think of Conner Prairie, I think of it as more of a living/interactive "museum" rather than a traditional museum.

Similarly, based on what I know it appears that Conner Prairie is more generic in that it covers a period of history (although certainly with an Indiana "flavor"); whereas Carillon seems to be more focused on history in the context of the Dayton area.

Beyond those observations, I'd to say the interests of your family/children would likely have an impact on which one would be more enjoyable.

That's my $.02,

hlo