Caryn, I've been doing some reading on the Kids Club Program and I found this info about RC...
Typical Youth Programs at Sea: For 3-11 year old: 9 a.m. - 12 noon; 2-5 p.m.; 7-10 p.m.
Typical Youth Programs in Port: For 3-11 year ols: 30 min. before the first shore excursion departs to 5 p.m; 7-10 p.m.
I do believe you just come and pick up your kids whenever. I know that they have to be at least 6 before they can leave by themselves (with parental consent, of course).
They also offer private babysitting for $8 per hour for up to 2 children, two hour minimum. And Late Night Group Babysitting for $5 per hour per child from 10 p.m. - 1 a.m.
Hope this helps.