I just celebrated my BIg 50 on the vision of the Seas. My friends told the head waiter and they brought me a dessert with a candle and sang to me. My stateroom attendant decorated my room with a sign and baloons which was a nice surprise. You could do the same for your friends while they are out of their cabin. My husband put funny photos of me up and down our hall. You might also buy your friends a bottle of wine or champagne that night at your table. Also I would suggest an even better gift is a credit at the photo dept to buy a special photo of their trip. They also have a gift certificate for their favorite 8X10 photo and a silver RCCL frame for under $50.00. This is something they will enjoy for years to come.