Baby frogs are called tadpoles. As tadpoles grow, they change shape. They turn into frogs.
A mother frog lays eggs in, or near, water. Inside each egg, a tadpole grows. Then the tadpole hatches. It has a long tail. The tadpole swims like a fish. It uses gills to breathe underwater.
Next, the tadpole grows legs and toes. Its gills and tail get smaller. The tadpole grows lungs. Now the tadpole is a froglet.
The froglet’s tail gets shorter. Soon, its tail is gone. It can leave the water. It can breathe using lungs. The froglet is now a frog.