They have a lot of dense tables of information, and a lot of illustrations of models wearing their wetsuit-flotation suits, having fun in the water, as well as almost a diorama with different kinds of diving gear. Near the entrance, there's almost a vending machine of different kinds of scuba tanks; they're all made of heavy steel, so you don't have to wear a heavy belt, and they are pre-filled with all kinds of combinations of breathing gases, from normal air to helium-filled in case you ever want to go deep to pure oxygen with helium diluent for the rebreather users. Additionally, you can get custom-fit full-face masks designed to cut down on the CO2 buildup as much as possible while letting you breathe through your nose.
The man wears just a pair of shorts and a pair of dive goggles on his head, giving a real sense of him being an experimenter who's been diving for as long as diving was a possibility. "Hello, girlie. What do you wish to buy here?"