S24E6: Scuba Lights, Interchangeable Sandals, Race Car Simulators, Fibreglass Doors

Powerful lamps and batteries are sealed inside pressure-resistant housings to create lights for underwater use. Replaceable uppers are fitted to reusable sandal soles; controls, displays and motion systems are assembled into realistic race-car simulators; and reinforced fibreglass skins are moulded around insulating cores to produce durable doors.