A trip to Mayfield Falls would make for one of those great unforgettable family experiences ( albeit speedier than Blue Hole)...if you are a Christmas card sender, likely to make the featured pic...so beautiful refreshing and breathtaking.

Black River is really neat and more just enjoying a pontoon ride to see some beautiful nature, gators and other wildlife.

Not sure if the morass is still open for a walking tour but that would be cheaper and easy to access.

Blue Hole had a strange unsavory vibe when I was there and no where I felt like I wanted to hang out ( esp w my kids)

Kool Runnings is a great waterpark, if you and your kids are looking for that kind of fun...

Keep checking in, as so many here offer valuable experiences to back up advice.
Have fun!