We are also going on the Emerald this summer (Aug. 1)! Our girls are coming - they are much older now - 18 and 23 - but they had a great time 5 years ago on the Caribbean Princess. There will be a ton of other kids their age on the ship. They have an organized teen center, if your kids like organized activities. The pizza station and MUTS were their favorite places to hang out, but they also enjoyed the freedom of coming and going from their cabin on their own (with some supervision of course). Don't worry, they will find plenty to do.