Under normal circumstances, Ocean Adventure has excellent hours for children age 3+. However, please be prepared for the possibility that covid restrictions may affect this. Prior to covid, it was rare for kids clubs to restrict hours, but they did have capacity limits and on some holiday cruises on some lines (I don't know about RC) children were turned away and parents lined up before opening hours to ensure a slot. The number of children sailing is likely to increase during the summer, so if your cruise is then you might want to ask here and on the family board close to your sailing to see how RC is handling it, and bring toys or electronics as a backup plan if AO is limited (and again, I have no information that might happen. I just know on some cruise lines there has been precedent for limiting admission during peak sailings for children in the past). I really hope that if OA needs to be limited that they do activities on the ship for kids - like turning a disco venue into a kids dance club and blowing up balloons and flashing the strobe light, or having the kids "make" cookies by mixing ingredients together (sandals did this, took the dough away and promised the kids they'd bake it and the kids could find their cookies in the cafeteria) or cookie decorating stations because otherwise there will be lots of unhappy parents, and other unhappy cruisers when a bunch of poorly supervised kids are running all over the ship.