Not sure this will help because my daughter is a little younger however last year at age 5 we cruised on Rotterdam and Statendam. Now age 6 we are cruising again in November on the Rotterdam.
She absolutely had a blast in the kids club. They had arts and craft, scavenger hunts, games, movies, dancing and one day they performed a dance they learned on the Lido for the parents. She loved the pool and learning how to play Shuffleboard. We also brought cards and checkers so we could play as a family.
Many people will say HAL isn’t geared towards children and some of that is true. No slides, race tracks, etc. But that’s the main reason that we love it so much. We don’t like being around 1000’s of kids. She has also been on two Disney cruises and prefers HAL due to the smaller number of kids. The staff is phenomenal with the children. I can’t say enough great things about them. I’m sure you will have an amazing time.