- Why Do Pigs Roll Around in the Mud?
- Why Do Rainbows Have So Many Colors?
- Why Do Sea Turtles Look Like They Are Crying?
- Why Does the Earth Need the Moon?
- 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 Frogs Are Wet
- 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 Blood Red?
- Why Is Milk White?
- Why Is Milk White?
- Why Is Snot Sticky?
- Why Is the Sky Blue? (Enhanced Edition)
- Why Water's Worth It
- Wild Animals: Classifying and Sorting
- Wild Cities
- Wild Horses
- Wild in the Streets
- Wild Life
- Wild Predators (Wild Kratts)
- Wild Scientists
- Wild Weather
- Wild World
- Wild, Wild Wolves
- Wildfires
- Wildlife Wong and the Orangutan
- Wilf the Mighty Worrier Rescues the Dinosaurs
- Will Jellyfish Rule the World?
- Winking, Blinking, Wiggling and Waggling (Enhanced Edition)
- Winter Sleep
- Winter Trees
- Wired
- Wisdom, the Midway Albatross
- Wish for a Fish: All About Sea Creatures
- Wolfsnail
- Wolves: For tablet devices
- Women In Science
- Wonderful Winter
- Wonders of the Night Sky
- Woodland and Forest
- World In Danger
- World's Cutest: Kittens
- World's Cutest: Puppies
- Would You Come Too?
- Would You Rather Be a Pollywog? All About Pond Life
- Write About It