When she paints a yellow sun on a blue sky, Luna learns how to make the color green.

A day at the beach gets the kids wondering: Do fish drink water?

It's an interstellar adventure as Luna and friends find out why stars twinkle.

The gang become robots to explore the surface of the planet Mars.

After the ballet, Luna notices bees communicating through dance.

Luna wants to plant a banana tree, but where are a banana's seeds?

After discovering Saturn's rings, Luna and the gang wonder if they can walk on them.

Luna and friends investigate the mystery of some missing kale.

To learn about that fresh, just-rained smell, Luna, Jupiter and Clyde become radishes.

Luna becomes a water drop to learn how water becomes rain.

A howling dog and a full moon send Luna and friends to the lunar surface.

Foggy mirrors in Luna's house get her thinking about condensation.

Clyde's grooming day gets the gang wondering what the world looks like through an animal's eyes.

Luna and friends discover that ant colonies rely on strength and teamwork.

The gang sees an amazing backyard sight: a shooting star!

When Clyde's toy boat sinks, the friends get curious about icebergs.

Munching on delicious rolls at the bakery, Luna wonders what turns dough into such a fluffy treat.

The gang checks out the zoo's new dinosaur exhibit.

Luna and friends notice interesting butterfly habits.

Luna investigates how birds fly after discovering a nest in her garden.

A dropped ice cream cone and Igor's astronaut sticker album makes the gang wonder about gravity.

The friends become intrigued by lightning bugs.

While playing with a pet snail, Luna wonders what it's like inside her shell.

A sunset inspires the gang to find out where the sun goes at night.

A rainbow inspires the kids to learn more about the "why" behind it.