With a 90-day or 12-month membership, additional children under 15 years old or juniors between the ages of 16 and 20 can be added for the full duration of the original membership.
Exclusively for a 12-month membership, you can add visiting members such as a single person, a couple, or a family with 2 adults and 2 children up to 15 years old, for a period of 30 days by paying an additional fee.