Pat and Nancy,
We loved Chankanaab Park. We did the Dolphin encounter. You don't swim with the dolphins, however you spend about 40 minutes in the water with the dolphin, the trainer and about 10 other guests. The dolphin will kiss you, and shake hands with you. You will have hands on with the dolphin. After they do have a beach in which you can swim and sunbathe, as well as a Mayan ruin villiage replica, it was very cool and educational. I really recommend this park. It was about $100.00 pp which included transportation as well. Have fun!!!