If I saw six children on my Canada/New England cruise, it was a lot -- though it must be said that my trip occurred after kids went back to school. The youth facilities are concentrated on deck 12 and are beautifully designed; during school holidays and/or family-friendly itineraries this will be a prime ship for families. For the younger set, there's a kiddie pool and waterslide. Teens have Fuel, their own hangout, and it offers a juice/coffee bar, televisions, cozy sofas, dance area, and computers. Nearby is the Adventure Ocean arcade.
Royal Caribbean's childrens' program, Adventure Ocean, divides kids into the following categories: Aquanauts (ages 3-5), Explorers (ages 6-8), Voyagers (ages 9-11), Navigators (ages 12-14), and Teens (ages 15-17). Childcare is available each evening from 10 p.m. to 1 a.m. at a rate of $5 per child, per hour.