One of the most beautiful frogs that are fairly easy to find in pet shops or at herp shows it the Red-Eyed tree frog. They are easy to take care of and easy to breed. Red-eyed tree frogs come from rain forests of Costa Rica in South America. They are excellent climbers. They are nocturnal and hide on the backs of leaves during the day and come out at night to hunt for small insects such as crickets.
Males are much smaller than females.
Many enthusiasts have successfully kept this species with great success under the right conditions. They can swim, so there is no worry of them drowning in any water areas you may have in their tank, just be sure there are places where the frog can climb out on to, if it falls in. But if more than 2 individuals are desired to be kept, I recommend a larger tank such as a 20'' high. It is better to have a tall tank so that you can put tall leafy plants in so they can climb and hide under. Once you have your aquarium picked out and ready to be setup, Get some plants at your local nursery which are suitable for tropical temperature and humidity, Ferns, Bromeliads and other plants with smooth surfaces that wont scratch or irritate the frogs skin.