Does anyone have experience with the on-board activities with a 12 year-old? It seems there are things for 3-12 year-olds, and separate activities for 13-17 year-olds. I'm wondering if your child found the activities for the younger set enjoyable or perhaps too "babyish"? If that was the case, is it allowed for 12 year-olds to join the older group? We will be on Viva, which doesn't seem to have a dedicated space for this age. Very grateful in advance for your advice!