Just sailed on the 4th cruise of Carnival's New Magic in Europe. You're going like this ship. Very well thought out especially for the "family" oriented itineraries they're planning from Galveston, Texas this fall/winter season.
Lots of space and planned programs for your kids 2-17. They divide them up well, age wise. Our 17 year old teenage girl loved the club style area for her age group. She met tons of other kids her age and they all seemed willing to hang out and have fun. Saw the 6-10 year olds a couple times eating and they were always smiling.
The NEW adult Serenity area was nice for getting away. It's quiet, great for reading or just resting without crowds. LOVED the canopy beach beds. Comfy cozy. A hot tub was right there for those who needed relax.