Most of "your" kids will enjoy the kids clubs. The 11yo
may not enjoy it as much. The clubs have lots of activities scheduled and there are family activities throughout the day, throughout the ship.
If nothing scheduled strikes their fancy, then they may like playing in the pools, going to all the movies they can stand, play ping pong, shoot hoops, making crank phone calls, play shuffleboard, run around the ship terrorizing the other passengers, eating all of the ice cream, cookies, burgers, hot dogs, pizza that they can stomach, make out with kids of the opposit sex, put you in debt buying smoothies with their room cards because "they're free" and doing the same with the video arcade cards, use the elevators as "rides" or "stops" (if they push every floor button), loiter in large groups on the stairways.
OK, I threw a couple of items in just to see if you were really reading

Actually kids from age 3 to 23 have been known to do some or all of the things in the above list, because that's what kids will do. Most are ok, some you "need to get a room for" and others are never appropriate.
Don't worry, your kids will have a great time!! The ship is a fun place to be!!
