I Wonder Why Collection 20 Books Set :

Titles In This Set:
Zips Have Teeth
The Wind Blows
Triceratops Had Horns
The Sun Rises
Spiders Spin Webs
Soap Makes Bubbles
The Sea is Salty
Romans Wore Togas
Pyramids Were Built
Planes Have Wings
Stars Twinkle
Castles Had Moats
Caterpillars Eat So Much
Countries Fly Flags
Hurricanes Have Eyes
I Sleep
Kangaroos Have Pouches
Leaves Change Colour
Penguins Can't Fly

Pirates Wore Earrings. and more

Description:
This highly popular and long-running I Wonder Why series has been revamped for a new generation of readers, with a clean, crisp redesign and colorful covers. The series explores questions that young readers ask about the world around them in an unrivalled child-friendly style. The conversational format is perfect for delivering solid information in a natural, amusing and imaginative way.