I fully agree with dale88fan's response. Walkie-talkies are an excellent way of keeping tabs on them when out of your sight. Have pre-designated meeting spots or times for them to check in with you and safety should not be an issue. There will be so many other children of similar age, that they will most likely be involved in the group activities at Adventure Ocean or will have found others to team up with. BTW, they will get their own daily compass of activities that are planned throughout the day just for their age group.