Geckos will like smooth aquarium stones in the bottom of the cage. Snakes will appreciate rocks to facilitate shedding, and iguanas and snakes both will like a hardwood driftwood branch for climbing. All linings should be changed regularly, with feces removed often. Hide boxes can double as nesting areas for some species-your veterinarian can tell you whether you'll need one for yours. The second component of building your pet's personal universe is to create a sun-of sorts.
Reptiles depend on the air temperature to maintain their body heat.
But regulating the temperature of your reptilian companion's environment means walking a fine line in determining their needs. If given the chance, reptiles will actually burn themselves when on, under, or around a direct heat source. Keep heat sources out of the cage if possible, and never place a cage or aquarium in direct sunlight without shade. In just ten minutes your friendly, fur-challenged friend can go from happy to heatstroke. And if your heat source must be in the cage, bear in mind that if it's too hot to rest your hand on, it's definitely too hot for Iggy.