When Madison and Alex are walking down the stairs of the hotel with both families they say, "What's that sound?" "That's the sound of the beach calling our name!" They go off towards the beach...clearly NOT taking their bathing suits. Since they are going down the stairs they are clearly NOT going to get them either. They are wearing tops where you could have seen the bathing suits and they didn't show, and also, they had nothing in their hands when they went down the stairs. Oops!