Well, that's awkward as in legless (and lungless). The majority of amphibians begin their lives in water with gills and tails instead of lungs and legs. While frogs famously begin life in tadpole form, it's important to note that salamanders and newts hatch as legless, wiggly little tadpoles, too!
And then there's the frog who shrinks as he develops. The paradoxical frog, Pseudis paradoxa, begins life as an enormous tadpole (up to 22 cm long) - nearly three to four times the length of post-metamorphosis adult frogs of the species!
2. The largest amphibian is the size of a full grown man.