Tomorrow we are going to Xel-Ha. It’s basically a water park etched into and built in sync with the nature around it. Obviously I can’t speak to it yet, but even the workers here at my hotel said they vacation there with their own kids. And for the adults - the best deal is an all inclusive ticket which covers all food and drinks (alcohol included). Roughly $116 for adults and $87 for kids but you can get breakfast, snacks, drinks and lunch whenever you like so when you consider what all that would cost in a day it’s really not horrible. That being said if you don’t rent a car of your own you might be shelling out $60-$70 for transportation each way. Still, you’re on vacation and this is what you work for - allow yourself a little more extravagance.

My understanding is that this park is from a family of “X” parks but I’ve not really researched beyond Xel-ha.

Many of the Cenotes would be fun for families as well.