How do birds make their eggs?

Do spiders have ears?

What would happen if it rained oobleck?

Do mice really like cheese?

How is wood made into paper?

How far has any astronaut traveled?

Do fish have tongues?

Are birds related to bats?

Why do bats sleep upside down?

Where does cinnamon come from?

What happens when big trucks roll over bacteria on roads?

Where does a candle go when it burns?

Why do bees buzz?

When your eyes are closed, are your pupils big or small?

How do cameras take photos and videos?

How and when did jokes start, and why?

What happens when lightning strikes water?

Why does bread change color and texture in the toaster?

Do worms sleep?

Which is older, the sun or the moon?