There's no such things as baby frogs.
They don't have pups like seals or dogs.
When hatching them from frog-spawn eggs
they don't have any froggy legs.

They're just a body with a tail
that wriggles through their swimming trail.
But over time they start to change 
in ways that we find very strange

They grow two arms and legs and lungs,
Their tail goes back inside their tums.
As frogs, they're hardly recognised
until they've met-a-morph-o-sized.