No lesson plan for this one, and no reading comprehension quiz, because they'll get it, don't worry. This is an amusing diversion...Sea Legs by British author Alex Shearer ... simply a good, funny kids’ book about twins who stow away on a cruise ship.
To have one’s sea legs is to be able to walk calmly and steadily on a tossing ship, or to become accustomed to a new or strange situation.