Cozumel with 8 kids and 4 adults

[lehmann6]

Two families are sailing RC June 2020 as a "last time all the kids will be at home" trip. We have 8 kids ranging from 6-18 years. I am thinking about booking the dolphin swim adventure in Cozumel through Dolphin Discovery (they have a 50% off sale currently). From what I can see, it would allow us entrance into Chankanaab Park which has other activities that we can do. Some of us might like to zip line so this may be an option for some of us to purchase while there. Is this a good excursion to book for two families? Any advice is appreciated. 

[JohninDC]

Chankanaab has lots to offer everyone, including a beach, small pool, separate snorkel area, sea life shows, etc.  Reviews of the buffet have been the only negative.