they will have a lot of fun on hal. this is one vacation they will not forget. it sounds like it is during spring break and a lot of kids would be on board. and you will be sailing from san diego the finnest city in the nation.
We took our 6 yr old son and 10 year old daughter on the Ryndam 10 day cruise to Mexican Riviera in March 05. The 10 year old loved the Club Hal and we were comfortable leaving her there. The program was well supervised for that age child. Our 6 year old was bored as he was with children 3-7 year olds. The night time entertainment was also a big hit with the kids. We live in San Diego so it was really convenient for us. Mexico is not my favorite place to visit but the cruise was still great.