I'm a 16 year old guy and have been on 5 cruises. I always use my sail and sign card for non-alcoholic pina-coladas, margeritas, and stuff like that. I think they average out like 4 bucks per drink. I dont really spend money in the arcade, and when i did i didnt think i could use my card to do so. So unless your kids will run crazy with it.. activate it, but just tell them not to go wild... theres really not much they can buy other than stuff from the gift shop, or internet access (which is so high i didnt even bother with it).