- Why Do Moving Objects Slow Down?
- Why Do Moving Objects Slow Down? (Enhanced Edition)
- Why Do Pigs Roll Around in the Mud?
- Why Do Puddles Disappear? (Enhanced Edition)
- Why Do Rainbows Have So Many Colors?
- Why Do Sea Turtles Look Like They Are Crying?
- WHY Does The Moon Change Shape?
- WHY Does The Moon Change Shape? Read-Along
- Why Doesn't My Cat Roar?
- Why Don't Astronauts Burp?
- Why Don't Sharks Have Bones?
- Why I Love Australia
- Why I Love My ABC
- Why I Love Quebec
- Why I Love Summer
- Why I Love the Forest
- Why I Love The Moon
- Why I Love the Ocean
- Why Is Milk White?
- Why Is Snot Green?
- Why Is Snot Sticky?
- Why Is the Sky Blue? (Enhanced Edition)
- Why Water's Worth It
- Why We Go to the Dentist
- Why We Go to the Doctor
- Wild Animals: Classifying and Sorting
- Wild Cities
- Wild Horses
- Wild in the Streets
- Wild Predators (Wild Kratts)
- Wild Style
- Wild Style (Enhanced Edition)
- Wild World
- Wild, Wild Wolves
- Wildlife on Paper
- Wildlife Wong and the Orangutan
- Will Jellyfish Rule the World?
- Winter Fun
- Winter Fun (Enhanced Edition)
- Winter Is Fun!
- Winter Fun (Enhanced Edition)
- Winter Is Fun!
- Winter Sleep
- Winter Trees
- Wired
- Wisdom, the Midway Albatross
- Wish for a Fish: All About Sea Creatures
- Wolfsnail
- Wolves: For tablet devices
- Women in Biology
- Women in Chemistry
- Women in Physics
- Wonderful Winter
- Woolly Mammoth
- Woolly Mammoth (Enhanced Edition)
- World's Cutest: Kittens
- World's Cutest: Puppies
- Would You Come Too?
- Would You Rather Be a Pollywog? All About Pond Life