介绍:
Do you know that animals grow and change?
A kitten and a puppy do.
Let's visit some other animals.
Look at the baby bird.
Baby birds crawl out of eggs.
Wait for time to pass.
The birds will grow and change.
They've got feathers now.
The birds will push off and fly away.
Look at the baby gerbil.
It is not done growing.
Wait for time to pass.
The gerbil will get big and grow fur.
Look at the baby tadpole.
At first, it looks like a fish.
Wait for time to pass.
The tadpole will turn into a frog.
