The staple of their diet should be crickets. They will also eat meal worms, super worms, wax worms, cock roaches, and pinkie mice.
Chameleons have the usual needs for vitamin D3 but in addition to this they need large amounts of vitamin A. Herptivite or Flukers are vitamins made especially for reptiles. Herptivites brand has no vitamin A but instead it contains Beta Carotein wich can be turned into vitamin A if needed.
Water can be supplied in two ways. The first way to supply it is to mist the cage once or twice a day and the second way is to supply a drip system to the chameleons cage.