Chicks hatch from eggs. They eat the white of the egg. They use their egg tooth to hatch from the egg. It starts out wet but as it gets older it is dry. It grows and grows and has it's own Chicks.
Butterflies lay eggs. Then they hatch and become baby caterpillars. They eat and they eat. When they get big enough they stop eating. Then they make a pupa. They get out of the pupa and become a butterfly. Then they make their own babies.
Frogs lay eggs. They hatch into a tadpole. Then it starts to get a long tail. It starts to get legs. Then they start to lose their tails. Then they are an adult. Then they lay their own eggs.