The Leaping Pad has links to many regional sites to help you identify frogs and their relatives. The ESP has a Webpage, Eggs to Toads, which includes weekly photographs of toad tadpoles as they develop into young toads. Frogland has some frog jokes, and other fun things. There is also information about frogs as pets. Wild frogs should not really be kept as pets.
Frogs already have problems from loss of habitat.
If you are thinking of a frog as a pet, you might look into those sold at pet stores. If you buy a non native frog, an African Clawed Frog for example, it should never be let go outdoors in the United States. For other science activities visit our Past Activities page.