When I was there 2 years ago children were $10.00 and adults were $20.00 but since their water slides have opend the prices doubled. They never said what ages but I assume anyone too young to drink alchohol as that is probably the reason for the double price. We had kids as old as 16 in our group and they paid childrens prices. We had a wonderful time but if you want to eat in their nice restaurants bring proper clothing. No bathing suits allowed. If not you will enjoy the snack bar on the beach. The food was hot and wonderful!