It varies by ship and sailing length. On 7 nights they used to have Pluto's Pajama Party where the kids would decorate pillow cases to bring home, my son still has his. But my kid didn't care if there was an activity or not, he just loved being there with all the cool play areas (and screen-based games, to be honest). I remember he attended a story time with Cinderella, a royal crown-making activity with Anna and Elsa, and a pirate activity of some kind where he earned chocolate gold doubloons. I think there was also an Olaf summer party in the kids club on the cruise but we missed it due to it conflicting with another thing he wanted to attend.