Susan picking a cruise is so very individual, we can give you our opinions and let you make your own decision. I believe that Disney has supervised babysitting for infants, not sure of the age limits, they give you a beeper in case they need to get in contact with you, go to Disney's web site, its full of great info and you can get a free planning video that really helps. You really can't go wrong with any of the cruise lines you are thinking about, they are all very kid-friendly. If you want a "Disney" experience then go Disney. If you aren't into everything Disney then I would pick either a Voyager Class ship of RCCL or the Grand Class ships of Princess- these are the big ships with lots to do. Sit down with a Travel Agent and tell them what you want and don't want and they will help you pick just the right cruise.