Hi! I am 15 and I have been on 2 cruises going on my third in May on the Carnival Sensation. This is my advice: Depending on where you are going, you will probablly be in your swimsuit most of the time. My BIG mistake on the first cruise was bringing WAY too many outfits. I have only been on Carnival and they have you dress up every night and two formal nights also so you might want to check about that. But definately need dinner outfits! Other than that just regular shorts and tanks or t- shirts are fine and sandals. But remember that the cabins aren't really huge so bring only the clothes that you really need. Other things to bring are like a bag to keep stuff in on the beach and your camera and good walking sandals. Definately need Sun Screen!!! It is extremely hot in the Caribbean. Other than that I say have a great time and anything you need you can buy cheaper there anyways! Hope you have a great first cruise! If you have any other questions feel free to e-mail me! Thanks!