I believe Op is looking for an activity for the kids IN THE ROOM rather than wandering the ship on their own while adults have a nice dinner. I have my own opinion on this scenario but, for a change, am keeping it to myself. When we took (not my favorite) grandson on a cruise, we offered arcade/gaming time. He was having so much fun in the pools/hot tubs/slides, he didnât use the offer. He also liked putting on nice(r) clothes & eating in the MDR. We donât know OPs grandkids so letâs not assume what they might do.