I took my daughter on a 5 day cruise when she was 13 months. She had an ear infection, but other than that she loved it.
My only concern about cruising is medical care. The on-board doctors are NOT good. It's better to call your own physician when you get in port. Many cell phones work in the caribbean, AT&T has towers on Carnival ships that don't cost extra. If you are not comfortable making medical decisions with limited help, I wouldn't take her.
Other than that, just bring everything you would normally use at home or take on vacation. Be sure to bring lots of sunscreen ad toys. A bigger room is preferable if she is an active child b/c there are not a lot of places to let her crawl.
It's basically like staying in a big hotel, plus you'll have family to help. Cruises are awesome, I recommend them to everyone, but if you aren't comfortable don't go until she's older. But I think you'll have a blast!
at 8:53 PM on Jun. 6, 2009