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🐣 How Animals Have Babies

Learn that some animals lay eggs and others give birth to live young, and meet babies that look nothing like their parents, like a tadpole and a frog.

lessons

~15 min

to learn

🔬 Science

subject

Ages 6–12

level

Start the course →

What you’ll learn

Eggs or Live BabiesGive examples of animals that lay eggs and animals that are born alive.Animals have babies in different ways. Birds, fish, frogs, and insects lay eggs that hatch. Mammals like dogs and cows are born alive and drink their mother's milk.
From Tadpole to FrogDescribe how a tadpole changes into a frog, an example of a baby that looks different from its parent.A frog lays eggs in water, and a tadpole hatches out with a long tail. The tadpole grows legs while its tail shrinks, until it becomes a frog. A tadpole and a frog are the same animal at different ages.
Big Changes, Little CopiesCompare babies that change a lot with babies that look like their parents.A caterpillar changes into a butterfly, looking completely different. But a puppy already looks like a little dog. Some babies change a lot as they grow, and some look just like their parents, only smaller.

Questions this course answers

Which of these animals lays eggs?

Birds lay eggs in a nest, and their babies hatch out of them.

Animals that are born alive and drink their mother's milk are called what?

Mammals, like dogs and cows, are born alive and drink their mother's milk.

What is a baby frog called?

A baby frog is called a tadpole. It has a tail and swims in the water.

How is a tadpole different from a grown-up frog?

A tadpole has a long tail and no legs, so it looks very different from a frog.

What does a caterpillar turn into?

A caterpillar changes into a butterfly, which looks completely different.

Which baby looks almost like its parent, just smaller?

A puppy already looks like a little dog, so it looks like its parent, only smaller.

Grounded in trusted sources

National Geographic Kids
San Diego Zoo Wildlife Explorers
Britannica Kids
Smithsonian's National Zoo

Every Wunder lesson is built from real, reputable sources — never invented.

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