How a Frog Grows

A frog is an amphibian. It hatches from an egg. As it grows, it changes many times. When it is an adult, it has long back legs. Frogs lay their eggs in water. Young frogs, or tadpoles, hatch from the eggs. They have tails to move and gills to breathe in water. They grow. The tadpoles keep changing. They grow front legs. They get lungs to breathe air. Their tails get smaller. Then they look like little frogs. They climb onto land and grow bigger.

Source: http://academic.emporia.edu/sievertg/tadpoles/Tadpoles.htm