So we just recently got back from the Mardi Gras. If you have the hub app, you can easily check the schedule for the kids club daily and what activities they’ll have. They had open play, crafts, games, theme nights, pajamas parties etc.
We registered our children at cruise check in and that’s where we also gave permission to who could pick them up and sign them in. Also if they could sign themselves out (age depending). Then on embarkation day we went down and they had the facility open for parents to tour and kids to check out. You could also register then if you hadn’t yet. Our 4 year old twins had an absolute blast!