Its four feet deep all over. And if you get waves, they will close the pool. Rough seas have the water spashing all over the place.
If your kids are looking for a swim vacation, cruising probably isn't a good choice. The pools are small. The Mickey slide is really for younger kids, the Goofy pool nothing more than a smallish rectangle filled with water (and kids!). My neighbor's back yard pool is bigger. The best water activities to be had on a cruise vacations are the beaches, but that leaves sea days, and in the afternoon, if the pool is open and the weather nice, that can leave for a very crowded pool. Also, relatively young kids are allowed to roam unsupervised, and end up at the pool, which is lifeguardless. You might be happier with an all-inclusive on the Mayan Rivereria or the Carribean.
(Its the Goofy Pool that they cover for parties and celebrations.)