One of the smallest, but most delightful touches on a cruise is to return to your cabin after dinner to find that your room steward has left an adorable animal created out of towels on your bed. This is a perk you'll find virtually every night on HAL ships, and it's practically guaranteed to make you end your day with a smile.
Once during the cruise, it's likely that there will be a demonstration by a crew member of just how they are created.
In fact, HAL published a book on creating towel animals. I don't know if it's still available, but you might find it in one of the shops.